His works were very popular, particularly the gigantic "Continens," one of the bulkiest of incunabula.

The Brescia edition, 1486, a magnificent volume, extends over 588 pages and it must weigh more than seventeen pounds.

It is an encyclopaedia filled with extracts from the Greek and other writers, interspersed with memoranda of his own experiences.

His "Almansor" was a very popular text-book, and one of the first to be printed.

Book IX of "Almansor" (the name of the prince to whom it was addressed) with the title "De aegritudinibus a capite usque ad pedes," was a very favorite mediaeval text-book.