Question: Historian Edward Horton Hubbard wrote the definitive biography of an architect that died in what year?

Context paragraphs:
Jill Roe: Jillian Isobel Roe, {'1': ", '2': ", '3': ", '4': "} (10 November 1940 – 12 January 2017) was an Australian historian and academic, who wrote a definitive biography of the Australian writer Miles Franklin.

History of Dianetics: The history of Dianetics possibly begins in the 1920s.  Its originator L. Ron Hubbard claimed that his ideas of Dianetics originated in the 1920s and 1930s.  By his own account, he spent a great deal of time in the Oak Knoll Naval Hospital's library, where he would have encountered the work of Freud and other psychoanalysts.  In April 1950, Hubbard and several others established the Hubbard Dianetic Research Foundation in Elizabeth, New Jersey to coordinate work related for the forthcoming publication.  Hubbard first introduced Dianetics to the public in the article "" published in the May 1950 issue of the magazine "Astounding Science Fiction".  Hubbard wrote "" at that time, allegedly completing the 180,000-word book in six weeks.

Margaret Stefana Drower: Margaret Stefana "Peggy" Drower MBE (1911–2012) was a historian of Ancient Near Eastern History and Egyptology.  She was awarded the MBE and elected a Fellow of the Society of Antiquaries of London.  She wrote the definitive biography of Flinders Petrie.

Scientology and racism: Scientology founder L. Ron Hubbard has been accused of harboring racist views; in a letter to his first wife, Polly Grubb, Hubbard wrote "You shouldn’t be scrubbing the floor on your hands and knees.  Get yourself a nigger; that’s what they’re born for."  Hubbard also strongly defended the apartheid system in South Africa and reportedly considered founding his own all-white colony on the continent.  He also spoke ill of Asians, saying "The trouble with China is, there are too many chinks here".

Edward Hubbard: Edward Horton Hubbard (2 July 1937 – 31 May 1989) was an English architectural historian who worked with Nikolaus Pevsner in compiling volumes of the "Buildings of England".  He also wrote the definitive biography of John Douglas, and played a part in the preservation of Albert Dock in Liverpool.

List of works by Thomas Lockwood: Thomas Meakin Lockwood (1830–1900) was an English architect whose main works are in and around Chester, Cheshire.  He was born in London, and brought up in East Anglia.  He trained in Chester with T. M. Penson, then established his own independent practice in the city in about 1860.  His most important patron was the First Duke of Westminster.  His sons W. T. and P. H. Lockwood joined him as partners in the practice in 1892.  According to the architectural historian Edward Hubbard he is the only 19th-century Chester architect, other than John Douglas, to have acquired a national reputation.  A memorial window to his memory is in the north aisle of St John the Baptist's Church, Chester.

Patricia Craddock: Patricia B. Craddock is an American author and professor of English.  She is a noted expert on the historian Edward Gibbon, the author of "The History of the Decline and Fall of the Roman Empire".  Craddock has published a two-volume biography, "Young Edward Gibbon: Gentleman of Letters" (Johns Hopkins, 1982) and "Edward Gibbon: "Luminous" Historian" (Johns Hopkins, 1989).

List of works by P. D. Q. Bach: The following is a list of works by P.D.Q. Bach, a fictitious Bach family member, the alter ego of composer Peter Schickele.  The first section lists, in alphabetical order, those works which have been recorded, are listed in the annotated catalogue of P. D. Q. Bach music in "The Definitive Biography of P.D.Q. Bach", and/or are listed on the Theodore Presser website.  "Schickele numbers", or "S." numbers, associated with some of the compositions, have either been assigned arbitrarily (with humorous intent) or are missing, and are not intended to provide the same service as Bach-Werke-Verzeichnis (BWV) numbers, also known, especially in early compilations, as "Schmieder numbers" or "S. numbers" after compiler Wolfgang Schmieder.  The second section lists "undiscovered works" that are mentioned in "The Definitive Biography".  The third section lists works by Schickele that have appeared on P.D.Q. Bach recordings.  The fourth section lists a few selections, not by P.D Q. Bach/Schickele, that have appeared on P.D.Q. Bach recordings.

Leonard A. Gordon: Leonard Abraham Gordon is a historian of South Asia, especially of Bengal, whose 1990 book "Brothers Against the Raj: A Biography of Indian Nationalist Leaders Sarat and Subhas Chandra Bose" is considered the definitive biography of Subhas Chandra Bose.

John Douglas (architect): John Douglas (11 April 183023 May 1911) was an English architect who designed over 500 buildings in Cheshire, North Wales, and northwest England, in particular in the estate of Eaton Hall.  He was trained in Lancaster and practised throughout his career from an office in Chester.  Initially he ran the practice on his own, but from 1884 until two years before his death he worked in partnerships with two of his former assistants.

Supporting paragraphs: Edward Hubbard John Douglas (architect)
Answer: 1911