exposure to the air, whose white colour may have won for Paris the name of Leucotia, or the White City, by which it is sometimes known to ancient writers. Caesar had done his work well, for so completely were the Gauls Romanised, that by the fifth or sixth century their very language had disappeared.[7] [Footnote 6: "_Cesare armato con gli occhi grifani._"--_Inferno_, iv. 123.] [Footnote 7: Of some 10,000 ancient inscriptions found in Gaul, only twenty are in Celtic, and less than thirty words of Celtic origin now remain in the French language.] But towards the end of the third century three lowly wayfarers were journeying from Rome along the great southern road to Paris, charged by the Pope with a mission fraught with greater issues to Gaul than were the Caesars and all their legions. Let us recall somewhat of the appearance of the city which Dionysius, Rusticus and Eleutherius saw as they neared its suburbs and came down what is now known as the Rue St. Jacques. After passing the arches of the aqueduct, two of which exist to this day, that crossed the valley of Arcueil and brought the waters of Rungis,[8] Paray and Montjean to the baths of the imperial palace and the public fountains, they would discern on the hill of Lutetius to their right, the Roman camp, garrison and cemetery. Lower down to the east they would catch a glimpse of a great amphitheatre, capable of accommodating 10,000 spectators.[9] [Footnote 8: The water supply of Paris is even now partly derived from these sources, and flows along the old repaired Roman aqueduct.] [Footnote 9: Part of this amphitheatre was laid bare in 1869 by some excavations made for the Compagnie des Omnibus between the Rues Monge and Linne. Unhappily, the public subscription initiated by the Academie des Inscriptions to purchase the property proved inadequate, and the Company retained possession of the land. In 1883, however, other excavations were undertaken in the Rue de Navarre, which resulted in the discovery of other remains of the amphitheatre which have been preserved and made into a public park.] [Illustration: REMAINS OF ROMAN AMPHITHEATRE.]