In the Middle Ages, some of the high dignitaries of the Roman Church thundered their anathemas against it, and caused edition after edition to be publicly burnt. What strikes one most is their profound ignorance of its real contents. They were satisfied to condemn it on hearsay evidence, or on the strength of some garbled quotations. Henricus Seynensis, a Capucin friar, having heard a good deal about the heretical Talmud, took it to be a Rabbi, and swore that he would ere long have him put to death by the common executioner. The censor, too, whose duty it was to amend any passage or expression found in the Talmud which might be construed in a sense hostile to the representatives of the Roman Church, displayed, as a rule, more zeal than erudition. Thus, for the Talmud to say, for instance, that a Roman swore by the Capitol or by Jupiter, was sufficient for the censor to find a hidden allusion to the Vatican or the Pope, and to alter the nomenclature, so that the Roman swore by the capital of Persia, or by the God of Babylon. This substitution of inappropriate names rendered many passages obscure, and this is one of the chief reasons why the Talmud has been repeatedly condemned as an unintelligible and nonsensical production. The great majority, however, of modern scholars, theologians, and orientalists read the Talmud, not to refute it, but rather to bring to light the vast store of knowledge hidden therein. And yet, in spite of the many allusions there are to it in theology, in Biblical lore, and in sacred geography, it still is to the majority of students a sealed book. The object of this essay is therefore to sketch in outline its essence and character, and to give some idea of its subject-matter.