Giovanni Costigan (1905–1990) was a noted historian and specialist in Irish and English history.
 Costigan was educated at the University of Oxford.
 He received a Master of Arts at the University of Wisconsin–Madison where he earned his PhD.
 In 1934 he joined the history department at the University of Washington where he served for 41 years.
 He was a staunch critic of American involvement in the Vietnam war.
 One Seattle reporter stated Costigan was a "combative man of peace."
 Costigan's published works include: "Sigmund Freud: A Short Biography"(1965), "Makers of Modern England" (1967), and "History of Modern Ireland" (1969).
 He was awarded with Man of the Year in Seattle and received the first Distinguished Teaching Award from the University of Washington.
Maharaja Jaswant Singh (26 December 1629 – 28 December 1678) was a ruler of Marwar in the present-day Indian state of Rajasthan.
 His father was Maharaja Gaj Singh.
 He was a distinguished man of letters and author of "Siddhant-bodh", "Anand Vilas" and "Bhasa-bhusan"
Samuel Johnson (18 September 1709 <nowiki>[</nowiki>OS 7 September]  – 13 December 1784), often referred to as Dr. Johnson, was an English writer who made lasting contributions to English literature as a poet, essayist, moralist, literary critic, biographer, editor and lexicographer.
 Johnson was a devout Anglican and committed Tory, and is described by the "Oxford Dictionary of National Biography" as "arguably the most distinguished man of letters in English history".
 He is also the subject of the biography, "The Life of Samuel Johnson" by James Boswell.
James P. Carley is a Canadian historian of English history, currently a Distinguished Research Professor at York University and a Fellow of the Royal Society of Canada.
Behind the Lines: Powerful and Revealing American and Foreign War Letters—and One Man's Search to Find Them, published in 2005 by Scribner is a book compiled by Andrew Carroll, the editor of three New York Times bestsellers, consisting of letters written by soldiers during the wars in American history, correspondences by their civilian families, and Carroll's search to find them.
 (and commentary on the letters) The book differs from the majority of other books regarding American wars as the letters, dating from the American Revolutionary War to the present War in Iraq, Include letters by foreign soldiers, instead of only Americans, reducing the amount of American bias.
 Also instead of merely focusing on the wars, Carroll also includes some letters which can be considered humorous (such as one where a soldier -who hated writing letters- just wrote a couple lines at the top and bottom of the page and added "P.S. they may censor this" so his parents would think the military had erased most of the letter), that tell the reader about the men who fought, and sometimes died, instead of just the wars that they fought in.
Letters from a Father to His Daughter is a collection of 30 letters written by Jawaharlal Nehru in 1928 to his daughter Indira Gandhi when she was 10 years old, teaching about natural history and the story of civilisations.
 At the time of the writing of the letters, Nehru was in Allahabad, while Indira was in Mussoorie.
The actual letters written by Nehru were in English.
 They were translated into Hindi by the famous Hindi novelist Munshi Premchand, and the name of the Hindi compilation is Pita Ke Patra Putri Ke Naam.
Hester Maria Elphinstone, Viscountess Keith, born Hester Maria Thrale (17 September 1764 – 31 March 1857), was a British literary correspondent and intellectual.
 She was the eldest child of Hester Thrale, diarist, author and confidante of Samuel Johnson, and Henry Thrale, a wealthy brewer and patron of the arts.
 She became the second wife of George Elphinstone, 1st Viscount Keith.
Estoire des Engleis (English: "History of the English") is a chronicle of English history composed by Geffrei Gaimar.
 Written for the wife of a landholder in Lincolnshire and Hampshire, it is the oldest known history chronicle in the French language.
 Scholars have proposed various dates for the chronicle's writing; the middle to late 1130s is commonly accepted.
 Largely based upon, or directly translated from, pre-existing chronicles, the "Estoire des Engleis" documents English history from the 495 landing of Cerdic of Wessex to the death of William II in 1100.
 The original chronicle opened with England's mythical Trojan beginnings, but all portions which document the period before Cerdic have been lost.
Matter of England, romances of English heroes and romances derived from English legend are terms that 20th century scholars have given to a loose corpus of Medieval literature that in general deals with the locations, characters and themes concerning England, English history, or English cultural mores and shows some continuity between the poetry and myths of the pre-Norman or "Anglo-Saxon" era of English history as well as themes motifs and plots deriving from English folklore.
 The term "Matter of England" was coined in reference to the earlier "Three Matters" as termed by the French author Jean Bodel; the Matter of Britain (concerning King Arthur and his knights), of France (concerning Charlemagne and his paladins) and of Rome (retelling of tales from Greco-Roman antiquity).
John Chamberlain (1553–1628) was the author of a series of letters written in England from 1597 to 1626, notable for their historical value and their literary qualities.
 In the view of historian Wallace Notestein, Chamberlain's letters "constitute the first considerable body of letters in English history and literature that the modern reader can easily follow".
 They are an essential source for scholars who study the period.

Question: Who is the daughter of arguably the most distinguished man of letters in English history?
Answer: Hester Maria Thrale