KELLER, Helen. Autograph letter signed to unidentified "dear little boys." N.p., July 1888.

ROWLING (J.K.) Autograph letter signed ('With lots of love, Jo'), to Emily ('Dear Emily'), thanking her for her letter in which the teenager described how reading the Harry Potter books helped her men

OSCAR WILDE (1854-1900) Autograph Letter Signed, to "Dear Mrs. Beringer," offering her daughter a minor role in Lady Windermere's Fan in the event of a vacancy, and considering allowing the Haymarket

CLARK, William (1770-1838). Autograph letter signed, one page. Fredricksburgh, July 5th, 1801 to John Thompson Mason, integral address leaf. 8 3/8" x 6 1/2" sheet, 23 1/4" x 16 1/8" framed. In this le

CHURCHILL (WINSTON)Autograph letter signed ('Winston S. Churchill') to 'Dear Sandys', apologising for missing him and advising he is about to sail for the Cape on the 14th ('...the actual fighting wil

* TCHAIKOVSKY, Peter Ilich (1840-1893). Autograph letter signed ("P. Tchaikovsky"), to Eduard Frantsevich Nápravník. N.p., 10 September 1883. 3 pages, 8vo, creased to folds; matted and framed with o

Charles Darwin autograph letter signed to his financial advisor, dated 12 July with no year, but docketed on blank page as 1854 by the recipient, Thomas Salt. At this time, Darwin was beginning to wri

ALS in French, three pages on two adjoining sheets, 5.25 x 8.25, February 5, 1900. Rare and beautiful handwritten letter by the illustrious author, giving some advice on marriage to his "dear friend."

Thomas Jefferson autograph letter signed with initials ("Th: J") as President. One page, 7.75" x 9.75", no place; July 12, 1806. Addr

Daniel Morgan autograph letter signed ("Danl Morgan"). One page, 6.5" x 8", "Saratoga", [his estate in Northern Virginia]; July 16, 178

ALS in French, signed “G. F.,” one page both sides, 5.5 x 8.25, [August 8, 1851]. Handwritten letter to his lover, Louise Colet, in part (translated): "I will be a little late at the meeti

ALS in French, signed “H.,” one page both sides, 7.75 x 10.25, no date. Letter to his daughter Marguerite, "My dear Marg," in part (translated): "Marquet arrived yesterday. He is already m

[SLAVERY & ABOLITION].  $300 Reward. Ranaway...my Negro Boy George Johnson. Broadside with autograph letter signed ("Nath'l W. Hays") on bifolium integral leaf to Chief of Police of West Chester,

George Weedon autograph letter twice signed ("G Weedon" and "GW"). One page, 7.5" x 13", Fredericksburg, Virginia; July 4, 1781. [To

Rare ALS signed “Edgar A. Poe,” one page, 7.75 x 9.75, August 24, 1846. Addressed from New York, a handwritten letter to writer Frederick William Thomas, who, from 1841 until 1850, worked

ALS signed “N. Tesla,” four pages on two adjoining sheets, 5.25 x 6.75, personal monogram letterhead, June 14, 1899. Handwritten letter to Rear Admiral Francis J. Higginson by Nikola Tesla

CROCKETT, DAVID. 1786-1836. Autograph Letter Signed ('David Crockett') to James Davison on the heels of his failed 1831 Senate bid, including much commentary on his political philosophy and his disput

Johann Kalb autograph letter signed ("Baron de Kalb"). Two pages on one leaf, 6.5" x 8.5", Anderson's Ferry, [Pennsylvania]; September

ALS as president, signed “Go: Washington,” one page, 6.75 x 8.5, April 8, 1791. Handwritten letter to his nephew George Augustine Washington, penned from Dumfries, Virginia, during his pre

MARION, FRANCIS. 1732-1795. Early Autograph Letter Signed ('Fran. Marion') from the Swamp Fox to General Benjamin Lincoln, from the field, 1 p, 4to (318 x 254 mm), ink on paper, 'Camp at Sheldon' [Sou

Thaddeus Kościuszko autograph letter signed ("Thad: Kosciusko Colo."). One page, 7.75" x 6.25", Fishkill [New York]; Dec

Richard Montgomery autograph letter signed ("R Montgomery"). One page of a bifolium, 7.25" x 9", New York; "Saturday" [circa June 1775]. Add

German mathematician (1845-1918) who created set theory, which has become a fundamental theory in mathematics. Cantor established the importance of one-to-one correspondence between the members of two

Benedict Arnold autograph letter signed ("B. Arnold"). One page of a bifolium, 6.5" x 8.25", Philadelphia; June 8, 1777. Addressed b

LEIBNIZ (GOTTFRIED WILHELM) Autograph letter signed ('Leibniz') to Thomas Burnett ('Monsieur'), in French, thanking him for '...the news you send me of the state of literature as well as of the politi