The god or gods identified with Mercury were very popular in Gaul, as Cæsar's words and the witness of place-names derived from the Roman name of the god show. These had probably supplanted earlier names derived from those of the corresponding native gods. Many temples of the god existed, especially in the region of the Allobrogi, and bronze statuettes of him have been found in abundance. Pliny also describes a colossal statue designed for the Arverni who had a great temple of the god on the Puy de Dôme.[56] Mercury was not necessarily the chief god, and at times, e.g. in war, the native war-gods would be prominent. The native names of the gods assimilated to Mercury are many in number; in some cases they are epithets, derived from the names of places where a local "Mercury" was worshipped, in others they are derived from some function of the gods.[57] One of these titles is Artaios, perhaps cognate with Irish _art_, "god," or connected with _artos_, "bear." Professor Rh[^y]s, however, finds its cognate in Welsh _âr_, "ploughed land," as if one of the god's functions connected him with agriculture.[58] This is supported by another inscription to Mercurius Cultor at Wurtemberg. Local gods of agriculture must thus have been assimilated to Mercury. A god Moccus, "swine," was also identified with Mercury, and the swine was a frequent representative of the corn-spirit or of vegetation divinities in Europe. The flesh of the animal was often mixed with the seed corn or buried in the fields to promote fertility. The swine had been a sacred animal among the Celts, but had apparently become an anthropomorphic god of fertility, Moccus, assimilated to Mercury, perhaps because the Greek Hermes caused fertility in flocks and herds. Such a god was one of a class whose importance was great among the Celts as an agricultural people. Commerce, much developed among the settled Gauls, gave rise to a god or gods who guarded roads over which merchants travelled, and boundaries where their transactions took place. Hence we have an inscription from Yorkshire, "To the god who invented roads and paths," while another local god of roads, equated with Mercury, was Cimiacinus.[59] Another god, Ogmíos, a native god of speech, who draws men by chains fastened to the tip of his tongue, is identified in Lucian with Heracles, and is identical with the Goidelic Ogma.[60] Eloquence and speech are important matters among primitive peoples, and this god has more likeness to Mercury as a culture-god than to Heracles, Greek writers speaking of eloquence as binding men with the chains of Hermes. Several local gods, of agriculture, commerce, and culture, were thus identified with Mercury, and the Celtic Mercury was sometimes worshipped on hilltops, one of the epithets of the god, Dumias, being connected with the Celtic word for hill or mound. Irish gods were also associated with mounds.