Walter Farquhar Hook,
A church dictionary
“ FONT. (Fons, a fountain.) The vase or basin at which persons seeking regeneration are baptized. The rites of baptism in the first times were performed in fountains and rivers, both because their converts were many, and because those ages were unprovided with other baptisteries. We have no other remainder of this rite but the name: for hence it is that we call our baptisteries “Fonts,” which, when religion found peace, were built and consecrated for the more reverence and respect of the sacrament. These were placed at first at some distance from the church; (see Baptistery;) ”
