Yet Zabara's reading must have been extensive. He knew something of astronomy, philosophy, the science of physiognomy, music, mathematics, and physics, and a good deal of medicine. He was familiar with Arabian collections of proverbs and tales, for he informs his readers several times that he is drawing on Arabic sources. He knew the "Choice of Pearls," the Midrashic "Stories of King Solomon," the "Maxims of the Philosophers," the "Proverbs of the Wise"; but not "Sendabar" in its Hebrew form. His acquaintance with the language of the Bible was thorough; but he makes one or two blunders in quoting the substance of Scriptural passages. Though he disclaimed the title of a Talmudic scholar, he was not ignorant of the Rabbinic literature. Everyone quotes it: the fox, the woman, Enan, and the author. He was sufficiently at home in this literature to pun therein. He also knew the story of Tobit, but, as he introduces it as "a most marvellous tale," it is clear that this book of the Apocrypha was not widely current in his day. The story, as Zabara tells it, differs considerably from the Apocryphal version of it. The incidents are misplaced, the story of the betrothal is disconnected from that of the recovery of the money by Tobit, and the detail of the gallows occurs in no other known text of the story. In one point, Zabara's version strikingly agrees with the Hebrew and Chaldee texts of Tobit as against the Greek; Tobit's son is not accompanied by a dog on his journey to recover his father's long-lost treasure. One of the tales told by Zabara seems to imply a phenomenon of the existence of which there is no other evidence. There seems to have been in Spain a small class of Jews that were secret converts to Christianity. They passed openly for Jews, but were in truth Christians. The motive for the concealment is unexplained, and the whole passage may be merely satirical.