The opprobrious name which the Turks bestow on the infidels, is expressed by Ducas, and Giaour by Leunclavius and the moderns. The former term is derived by Ducange (Gloss. Graec tom. i. p. 530), from in vulgar Greek, a tortoise, as denoting a retrograde motion from the faith. But alas! Gabour is no more than Gheber, which was transferred from the Persian to the Turkish language, from the worshippers of fire to those of the crucifix (D'Herbelot, Bibliot. Orient. p. 375).