Footnote 1:

The 1555 edition is more specific: “Mansor of Bokhara in Persia,” the caliph at Baghdad, Manūr ibn Isāq, to whom the Persian physician Rhazes (c. 860-c. 925) dedicated his medical textbook known in the west as Almansor. Vesalius’ first publication was a paraphrase of book nine of this treatise, Paraphrasis in nonum librum Rhazae medici arabis clariss. ad regem Almansorem (February 1537), on which see O’Malley AVB pp. 69-72.