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A schoolhouse in Ripon, 20 March

The listing carries no date beyond 1854. The Ripon Historical Society places the meeting usually credited with proposing the party on 20 March, in the Little White Schoolhouse in Ripon, Wisconsin, following an earlier local protest meeting on 28 February and the Senate's passage of the Nebraska bill.

Alvan Bovay argued that a new party should — and probably would — be called "Republican," though the society's own account says he advised against formally assigning the name that night.

The meeting appointed a committee of five: Bovay, Amos Loper, Abram Thomas, Jehdeiah Bowen and Jacob Woodruff.

"No real genuine organization was formed"

A later recollection by the attendee A. A. Loper said the central purpose was preventing slavery's further extension, but that "no real genuine organization was formed" at the meeting.

Loper also remembered reaching the schoolhouse through a furious snowstorm with the temperature below zero. Accounts disagree on how many were there, so no attendance figure is treated as verified.

Whose birthplace, and against what

The Wisconsin Historical Society emphasises that similar meetings were held across the North that year, and that the answer depends on how "birthplace" and "party" are defined. Ripon's claim competes with Jackson, Michigan, where a statewide convention formally used the Republican name and adopted a platform on 6 July 1854.

One thing the March meeting cannot have been reacting to is the Kansas–Nebraska Act itself, which did not become law until 30 May. The men at Ripon were opposing a pending bill and its passage through the Senate.

Printed in a Brooklyn job shop

Unable to secure a conventional publisher for an unusual group of poems, Whitman paid to produce the first edition himself in 1855. Copies were offered for sale in Brooklyn and New York in late June.

Andrew Rome printed the book in his Brooklyn job-printing shop with help from his younger brother Thomas. Whitman designed the volume and is believed to have set several of its pages of type himself.

Bibliographies often credit the "Rome Brothers," but a third brother, James, had died before the work was done.

Twelve untitled poems, ninety-five pages

The edition presented twelve untitled poems and a preface across 95 pages. No author appeared on the title page, although Whitman's name was in the copyright notice and Samuel Hollyer's engraved portrait served as the frontispiece — facing the title page, not on the cover.

It was a thin but large volume, roughly 29 cm tall, closer to a magazine than to anything pocket-sized. Only 795 copies are documented as bound, in several different styles and states.

"Song of Myself" and "I Sing the Body Electric" are later titles; the versions printed here carried none.

The Fourth of July date is a tradition

July 4 is a symbolic release date rather than a documented one. The Whitman Archive says copies were on sale in late June, and the Library of Congress dates the first surviving announcement that the book was for sale to July 6.

Because the edition survives in multiple bindings, issues and states, any account of a single uniform release day can mislead. Ralph Waldo Emerson, sent a copy, answered with a celebrated letter dated July 21, 1855.

An Easter vacation in an east London attic

During the Royal College of Chemistry's Easter vacation in 1856, the 18-year-old William Henry Perkin worked in his home laboratory in east London on August Wilhelm von Hofmann's proposed route to synthetic quinine.

An allyltoluidine experiment failed. Perkin repeated the oxidation with aniline, and washing the dark product with alcohol gave a purple solution that readily dyed silk and survived washing.

The work happened in the family home, not in Hofmann's college laboratory.

From flask to patent inside a year

Perkin, his brother Thomas and his friend Arthur Church ran further trials and sent samples to Robert Pullar of the Pullars dyeworks in Perth for practical evaluation.

Perkin then secured British Patent No. 1984, "Dyeing Fabrics," dated 26 August 1856, covering a new lilac or purple colouring matter for textiles. Calling the outcome accidental describes the unexpected product rather than the dye: recognising it, testing it, scaling it and patenting it was deliberate work.

It was not called mauveine at the time

"Mauveine" is the modern chemical name. Perkin's product was first described and marketed as aniline purple or Tyrian purple, and "mauve" came into common use later.

The date is softer than it looks. The year and the Easter-vacation setting are well attested, but the sources consulted here do not establish a precise discovery day, so modern claims for 23 March should not be treated as certain.

The safest priority claim is the first commercialised synthetic dyestuff, rather than an unqualified claim over every earlier artificial colorant.

A night march of thirty-six miles

Sepoys who rebelled at Meerut on 10 May 1857 marched roughly 36 miles to Delhi, took control of the city the next day, and secured the support of further regiments. The whole sequence took under 24 hours.

It was not the work of one homogeneous force. Meerut sepoys, defecting Delhi troops and civilian participants all had parts in it, and rebels aided by people from the Delhi bazaar killed Europeans and Indian Christians in the city.

The pensioner at the Red Fort

The mutineers went to the Red Fort to request Bahadur Shah Zafar's support and leadership. The elderly and politically weak Mughal emperor accepted reluctantly and became the rebellion's emblematic leader.

He had neither planned the march nor begun the uprising; armed men arrived at his palace and asked him to lead them.

The magazine and the last telegram

Nine East India Company ordnance personnel defended the Delhi magazine under George Willoughby. When attackers scaled its walls and relief appeared impossible, the defenders ignited the magazine rather than surrender the arsenal intact.

Before abandoning their office, Delhi's telegraph staff sent warnings that the Meerut sepoys had arrived, that bungalows were burning and that communications were collapsing; the message was relayed onward from Ambala.

Company authority inside the city had collapsed by the end of the day. What the rebels had gained was a major political and symbolic centre, not a unified national command.

Six days of street fighting end at the Ajmir Gate

The assault on Delhi began on 14 September 1857, after siege artillery breached the walls, and days of street fighting followed. Early on 20 September the British-led force took the Lahore Gate, Garstin Bastion and Ajmir Gate.

It then occupied the Mughal palace in the Red Fort, Selimgarh and the Jama Masjid, completing military control of the city. Most rebel sepoys had evacuated during the night of 19–20 September, so several of the final advances met little resistance.

"British" covers a mixed army

The National Army Museum puts about 9,000 troops before Delhi by 14 September, of whom roughly one-third were British; the rest were Sikhs, Punjabi Muslims and Gurkhas.

John Nicholson, commanding a storming column, was mortally wounded in the opening assault on 14 September and died on the 23rd.

British and allied troops ransacked Delhi after taking it, and contemporary and museum accounts document extensive looting and killing.

The emperor was taken the next afternoon

Bahadur Shah Zafar was not in the palace when it fell; he had taken refuge at Humayun's Tomb. Charles John Griffiths, who took part in the siege, places his capture by William Hodson on the afternoon of 21 September, so the listed title compresses two related events.

Guards were posted at Delhi's gates and armed patrols entered the streets, replacing rebel control with military occupation by the end of 20 September.

Sixty-nine and a half feet

At the Seneca Oil Company site beside Oil Creek on 27 August 1859, Edwin Drake's crew reached a final depth of 69½ feet and withdrew its tools for the day. The bit had dropped into a petroleum-bearing rock crevice.

Shallow collection pits had not yielded enough petroleum, so Drake and his driller adapted salt-well percussion drilling. Drake introduced iron drive pipe to stop the unstable upper bore from collapsing.

The man at the drill was not Drake

William A. "Uncle Billy" Smith, an experienced salt-well driller and blacksmith, did the drilling under Drake's direction. Drake organised and supervised the enterprise.

Smith came back on Sunday, 28 August, saw oil floating in the bore and brought some up, reportedly using an improvised container. Drake arrived on Monday and installed a hand pump.

The man remembered as "Colonel" Drake held no military rank.

What the anniversary actually marks

27 August is the conventionally commemorated completion or "strike" date, but it marks reaching the productive formation rather than the moment oil was first seen.

The output figures are unsettled too. A Petroleum History Institute review notes published estimates of 10, 20, 25 and 40 barrels per day, so any precise 12-to-20-barrel range should not be treated as established.

The defensible claim is a narrow one: the first successful American well deliberately drilled for petroleum, not the first place anywhere that oil emerged from a well.

Wrong day, wrong army

The listing puts the start of the siege on 3 November 1860 and attributes it to the combined forces of Giuseppe Garibaldi and Victor Emmanuel II. An official Italian Army chronology dates the beginning to 5 November, under General Enrico Cialdini.

The besieging force was the regular Piedmontese army, commanded operationally by Cialdini. Garibaldi had transferred his authority to Victor Emmanuel after their meeting near Teano; the king held supreme political and military authority but did not direct the siege himself.

Four dates for one operation

The move on Gaeta followed the Piedmontese capture of Mola di Gaeta on 4 November, which opened the approach to the isthmus. Cialdini's troops began investing the landward approaches and preparing artillery positions.

A Cambridge University Press study dates the sustained siege from 13 November. Other narratives use 4, 11 or 12 November, according to whether they count the advance, the investment, the first land fighting or the full bombardment.

On the sources here, 5 November is the best-supported operational start, but the beginning remains definition-dependent.

A fortress still open to the sea

Francis II, his court and the remaining Bourbon field army were concentrated in the fortified coastal town. Capua's capitulation and the defeat at Mola had pushed them back into it.

The blockade was not complete at first: a French naval presence kept Gaeta's seaward communications open, leaving the besieged court connected to the outside world.

Gaeta was Francis II's last royal refuge rather than the last Bourbon fortress. Messina's citadel and Civitella del Tronto went on resisting after Gaeta surrendered.

A referendum written into the ordinance

On 23 May 1861 qualified voters across Virginia went to the polls to ratify or reject the Ordinance of Secession that the Virginia Convention had adopted on 17 April by 88 votes to 55. The ordinance provided that it would take effect only on approval by a majority of those voting in the referendum.

The reported majority favoured ratification. Governor John Letcher later certified 125,950 votes for and 20,373 against.

The constitutionally eligible electorate was restricted principally to adult white men, so this was not a vote of all Virginia residents.

Totals the governor could not verify

Letcher's proclamation of 14 June acknowledged that returns from several counties were unavailable and supplemented the record with estimates from newspapers and other sources. Later unofficial reconstructions produce different totals.

Opposition was concentrated in parts of western and northern Virginia, although missing returns make the complete western result impossible to reconstruct with certainty. Voting was not secret, and contemporary and later testimony records intimidation of some Unionists.

Ratifying what was already under way

The decisive reversal had come on 17 April, after Lincoln's call two days earlier for 75,000 troops moved many conditional Unionists in the convention. That same convention had rejected secession on 4 April.

By 23 May, Virginia's alignment was largely a fait accompli. State authorities had mobilised forces, seized federal installations, entered an alliance with the Confederacy and allowed Confederate troops into Virginia before the votes were cast.

A letter to an editor, 15 August

On 15 August 1861 the German palaeontologist Hermann von Meyer wrote to the journal editor Heinrich Georg Bronn, describing a fossil impression preserved on the matching faces of two split slabs from the lithographic limestone at Solnhofen, Bavaria.

He identified the impression as a feather that could not be distinguished morphologically from a bird feather. Because no bird fossils of comparable antiquity were then securely known, his first notice was cautious about whether the feather genuinely came from the ancient Solnhofen deposit.

The name arrived six weeks later

The August communication was the first description, but von Meyer did not introduce the name Archaeopteryx lithographica until a follow-up letter dated 30 September.

In that second letter he reported that he had confirmed the fossil's nature, proposed the name, and relayed news of a recently found feathered skeleton near Langenaltheim.

The 15 August date belongs to the letter itself — not to the journal issue's physical publication, and not to the naming.

Two cities, and an unsettled identification

The two counterpart slabs are now divided between the Museum für Naturkunde in Berlin and the Bavarian State Collection in Munich.

Whether the isolated feather belongs to Archaeopteryx at all is still disputed. A 2020 study argued that its morphology is most consistent with an Archaeopteryx wing covert, responding to a contrary interpretation published in 2019.

Even the year of its discovery is loose: the feather is often dated to 1860, but no surviving evidence fixes whether it was found in 1860 or 1861.

A written message, read by a clerk

On 1 December 1862 Abraham Lincoln transmitted his written Second Annual Message to the 37th Congress. Following the practice of the time he did not deliver it as a speech; the secretary of the Senate read it aloud.

At 8,385 words it was the longest of Lincoln's four written annual messages.

Three amendments, with a deadline in 1900

Lincoln proposed three constitutional amendments: federal compensation for states abolishing slavery before 1900, permanent freedom for people freed through the war with compensation for loyal owners, and congressional authority to fund consensual colonisation outside the United States.

The gradual window ran 37 years, ending 1 January 1900. States that abolished slavery voluntarily within it would receive federal bonds.

This was a distinct programme rather than a restatement of the Preliminary Emancipation Proclamation he had issued on 22 September.

The war would not wait for Congress

He said explicitly that neither the war nor implementation of the preliminary proclamation would be suspended while Congress considered the compensated plan.

Lincoln closed the emancipation argument by declaring that freeing enslaved people would also preserve freedom for the free, and that the nation would either nobly save or meanly lose "the last best hope of earth."

The message altered no one's legal status that day; the final Emancipation Proclamation followed on 1 January 1863.

The resolutions came on the last day

The conference sat in Geneva from 26 to 29 October 1863, and the ten resolutions were adopted on the closing day rather than the opening one the listing carries.

They established a common framework for national voluntary committees that would assist military medical services in wartime. Three separate recommendations to governments were issued alongside them.

Committees in peacetime, armlets in war

National committees were to prepare supplies and train voluntary medical personnel during peacetime, then place those volunteers under military command in wartime.

The conference selected a white armlet bearing a red cross as the uniform distinctive sign for voluntary medical personnel attached to armies.

The recommendations, kept distinct from the ten resolutions, asked governments to recognise the neutrality of ambulances, hospitals, medical personnel, relief volunteers, assisting inhabitants and wounded soldiers.

Not a treaty, and not a founding

The resolutions were a nonbinding charter for the emerging movement, not a treaty signed by sixteen countries. Binding rules came with the First Geneva Convention of August 1864, negotiated by a separate diplomatic conference convened by Switzerland.

Nor did the meeting create the Geneva committee: the five-man International Committee for Relief to Wounded Soldiers had already constituted itself in February 1863, and adopted the name International Committee of the Red Cross in 1875.

The first national society was formed in Württemberg the following month.

Volume 153 of the Philosophical Transactions

Owen's detailed study of the first Archaeopteryx skeleton appeared in 1863, in volume 153 of the Philosophical Transactions of the Royal Society, under a title beginning "On the Archeopteryx of von Meyer."

He described the Bavarian fossil's skeleton and feather impressions and classified it unequivocally as a bird, emphasising its exceptionally long, jointed tail. His title used the new species spelling Archeopteryx macrurus, distinguishing the skeleton from Hermann von Meyer's isolated feather.

Bought inside a lot of 1,900 fossils

The specimen had entered the British Museum in 1862 as part of a collection of more than 1,900 Solnhofen fossils purchased from Karl Häberlein for £700. The price covered the collection, not Archaeopteryx alone.

The skeleton came from near Langenaltheim in Bavaria. Its head was incomplete, and Owen did not recognise teeth in it.

Not the first description of a fossil bird

The claim in the listing does not hold. Fossil birds were already known, von Meyer had already described the Archaeopteryx feather, and a short firsthand notice of the skeleton appeared before Owen's full memoir — which is best described as the first extensive anatomical account of the London specimen.

The year is a publication date rather than a moment: the Royal Society received the manuscript on 6 November 1862 and had it read on 20 November 1862.

Owen resisted treating the fossil as a missing link, and Darwin's own discussion of Archaeopteryx did not appear until the fourth edition of On the Origin of Species in 1866.