The custom of eating fish on Friday (_Dies Veneris_) is considered a survival of the days when a peculiar sexual signification was given to the fish, which has such a prominent place in Christian symbolism. Fig. 9 illustrates the origin of the bishop's mitre. The _vescica piscis_, or fish's bladder (fig. 10), is a well-known ecclesiastical emblem of the virgin, often used in church windows, seals, etc. The symbol is equally known in India. Its real nature is shown in fig. 11, discovered by Layard at Nineveh, depicting its worshipper seated on a lotus. The vescica piscis is conspicuously displayed in fig. 12, copied from a Rosary of the Blessed Virgin, printed at Venice 1582, with the license from the Inquisition, in which the Holy Dove darts his ray, fecundating the Holy Virgin. Many instances of Christ in an elliptical aureole may be seen in Didron's _Christian Iconography_, fig. 71, p. 281, vol. i. strikingly resembles our figure. [Illustration: Fig. 9.; Fig. 10.; Fig. 11.] [Illustration: Fig. 12.] CIRCUMCISION. Among the many traces that the Jews were once savages I place the distinguishing mark of their race, circumcision. Many explanations have been given of this curious custom. The account, in Genesis xvii. that God commanded it to Abraham, at the ripe age of 99, critics agree was written after the exile--that is, thirteen hundred years after the death of the patriarch. Now, there is evidence from the Egyptian monuments that circumcision was known long before Abraham's time. This constrains Dr. Kitto to say, "God might have selected a practice already in use among other nations." If so, God must have had a curious taste and an uninventive mind. Why, having made people as they are, he should order his chosen race to be mutilated, must be a puzzle to the orthodox. Some writers have absurdly argued that the Egyptians borrowed from the Jews, whom they despised (see Genesis xliii. 32). Apart from the evidence of Herodotus and of monuments and mummies to the contrary, this view is never suggested in the Bible, but the testimony of the book of Joshua (v. 9) implies the reverse. The narrative of the Lord's attempted assassination of Moses (Exodus iv. 24-26), which we shall shortly examine, has the most archaic complexion of any of the biblical references to circumcision, and from it Dr. T. K. Cheyne argues that the rite is of Arabian origin.* If instituted in the time of Abraham under the penalty of death, it is curious that Moses never circumcised his own son, nor saw to its performance in the wilderness for forty years, so that Joshua had personally to circumcise over a million males at Gilgal.