Alexander Henderson contributed to which compendium, written by about 100 full-time editors and 4,000 contributors at current?
Encyclopædia Britannica The Encyclopædia Britannica (Latin for "British Encyclopaedia"), published by Encyclopædia Britannica, Inc., is a general knowledge English-language encyclopaedia. It is written by about 100 full-time editors and more than 4,000 contributors, who have included 110 Nobel Prize winners and five American presidents. The 2010 version of the 15th edition, which spans 32 volumes and 32,640 pages, was the last printed edition; digital content and distribution has continued since then.
Alexander Vasiliev (historian) Alexander Alexandrovich Vasiliev (Russian: Алекса́ндр Алекса́ндрович Васи́льев ; 4 October 1867 – 30 March 1953) was considered the foremost authority on Byzantine history and culture in the mid-20th century. His "History of the Byzantine Empire" (vol. 1–2, 1928) remains one of a few comprehensive accounts of the entire Byzantine history, on the par with those authored by Edward Gibbon and Fyodor Uspensky.