The Making of the Catholic Encyclopedia (1917) – NEW ADVENT

The need of a Catholic Encyclopedia in English was manifest for many years before it was decided to publish one. Editors of various general Encyclopedias had attempted to make them satisfactory from a Catholic point of view, but without success, partly because they could not afford the space, but chiefly because in matters of dispute their contributors were too often permitted to be partial …

http://www.newadvent.org/cathen/00001a.htm