With regard to the derivation of the word “Galicia” there are still many contested opinions. Florez[16] tells us that the ancients spelt it both with a C and a G. Martial speaks of “Oceano Callaico,” and Brutus was called “Callaicus” when he returned to Rome for his “triumph.” St. Isidore of Seville derived the word “Galicia” from γαλα, the Greek word for milk, thinking that the inhabitants had received the name on account of their milky-white complexions. Julius Cæsar begins his _Commentaries_ by saying that they called themselves Celts in their own language[17] and that the Roman equivalent was “Galli,” but Florez argues that as the Celts had relations with the Greeks long before they had any with Rome, we must take the name _Galatos_ to be much more ancient than that of Galli, the former having been used by the Greeks, and the latter by the Romans. St. Isidore says that the Gallegos were also called Galos, and that both these names originated in the fairness of their complexions; but again Florez demurs, assuring us that he has never seen in any document the name of Gallos applied to the Gallegans. “We know,” he adds, “that the Celts entered Galicia, but the territory they occupied was called ‘_celtico_,’ not ‘galico’ nor ‘galiciense.’” Mela and others thought, on the other hand, that the term _Calaicos_ was derived from the name of a town called Cale. Florez says that it is certain, from the writings of Sallust, that there once existed a town of the name of Cale to the north of the Duero, and that at the mouth of that river there was a Portus Cale, from which the name of Portugal is derived; but he concludes his chapter on this subject by declaring that it is impossible to say what is the true derivation of the word “Galicia.” The question as to how and whence the Celts entered Galicia has become of late years a thorny subject to Spanish students of Gallegan history, and a foreigner who has followed their discussions can hardly approach it without feeling that he is treading upon dangerous ground. I shall avoid taking it upon myself to decide which of the many theories put before the Spanish public is nearest to the truth. There are some who think that Galicia, Ireland, and America were once connected by land, and there are many who maintain that in prehistoric times there must have been a close maritime intercourse between Ireland and Galicia.