ARGUS³. Muhammad ibn-Musa al-Khwarizmi (fl. c. 840) wrote a series of astronomical tables. About 1126 Adelard of Bath, working from the Spanish versions, produced a Latin version of al-Khwarizmi's astronomical tables, and about 1149 Robert of Ketton revised Adelard's version, turning into Latin many Arabic words retained in the text. Al-Khwarizmi's work, Hisab al-Djabr wa 'l-Mukabala, was translated by Gerard of Cremona between 1176 and 1187 with the Latin title Al-Goritmi de numero indorum, or The Book of Addition and Subtraction. The word al-djabr of the Arabic title gives us our word algebra.

The passage mentioning Argus, the noble counter, BD 434-442, is a paraphrase of RR 12790-12810.

Chaucer's Argus is derived from OF Algus. The French variant is derived from algorism, a development of al-Khwarizmi, which means in Arabic the Khwarizmian or the man from Khwarizmi. Nicholas has placed his augrim or arithmetic stones, marked with the numerals of algorism, neatly spaced on shelves above his bed's heads, MillT 3210. Nombres in augrim, or arithmetic numbers, appear in Astr I.9.3. [Gerard of Cremona: Nicholas¹]