John Sutherland Black, 1911 Encyclopædia Britannica (1911)
“ Although the Roman is very much larger than any other liturgy, the communion office is not in itself inordinately long. The greater part of it is contained in the “ordinary” and “canon” of the mass, usually placed about the middle of the missal, and occupies, though in large type, only a few pages. The work owes its bulk and complexity to two circumstances. On the one hand, in the celebration of the sacrifice of the mass practically nothing is left to the discretion of the officiating priest ”
