An interesting illustration is supplied by the three Cornish words, Eglos (_Ecclesia_), Escop (_Episcopus_) and Pleu (_Plebs_)—interesting because the final judgment must be held in suspense until a survey has been made of their ramifications. All three words are found in the place-names of this county. Eglos is found in Lanteglos, Egloskerry and in some other places; Escop is found in Trescobeas in Budock, formerly appendant to the bishop’s manor of Penryn, also in Mainen Escop (Bishop’s Rock), in the Isles of Scilly; Pleu is found in Plunent, the ancient name of Pelynt, in Pluvathack (Budock) and possibly in Bleu Bridge in Gulval. Names beginning or ending in Eglos are numerous in Cornwall; those having Pleu for the first syllable are very few in number. In Brittany very few place-names are composed of Eglos and Escop, whereas Pleu enters into many. Why does Pleu rather than Eglos lend itself so readily in Brittany to the exigencies of ecclesiastical nomenclature? Were it not that Lan (monastery) is equally distributed in the two countries, we should be tempted to say that in Cornwall a Celtic word (lan) was preferred to a Latin word (plebs) to describe the ecclesiastical unit. Some difference of condition or of association there must have been to account for it. That which most readily occurs is that Armorica was thoroughly Latinised before the insular Celts arrived there, whereas Cornwall was probably never brought into close contact with Roman civilisation as such except on and near the coast; in other words, that Plebs was in use in the former country before it became Christian and acquired afterwards a specific ecclesiastical signification, whereas in Cornwall it was introduced along with Christianity or after Christianity had taken root. Very few traces of Roman civilisation are to be found in this county. The Roman milestone at St. Hilary is almost unique. Roman coins, of which many have been found in the county, do not prove Roman settlement. It is certain, however, that Britain had become Christian, at least in name, before the Roman legions were withdrawn, and it is therefore probable that the words Eglos, Escop and Pleu had been received into the Cornish language before that time. And the true explanation of the persistence of Pleu in the place-names of Brittany seems to be that the insular Britons, who had acquired the word Plebs during the Roman occupation, converted it, for ecclesiastical purposes, into Pleu and took it with them when they emigrated to Armorica, where very soon it had to give place to the word Pares (from the French Paroisse), though not before it had taken root in the place-names. In Cornwall and Wales, on the other hand, Pleu remained in current use and is therefore seldom found in the place-names of those countries. Making allowance for changed conditions, the same explanation accounts for the persistence of the word Lan in the place-names of all