Analysis of information sources in references of the Wikipedia article "Breviary" in English language version.
The Goths of Spain had their Breviary; the French Church had its Breviary; England—"the Breviary of Salisbury"—and Scotland, "the Breviary of Aberdeen"—all which, along with many more evidences of the independence of national churches, Rome has laboured to obliterate by commanding the exclusive use of the Roman Breviary, and thus extinguishing every appearance of a divided worship, and of independent national and self-regulated churches.
: a book of the prayers, hymns, psalms, and readings for the canonical hours
The Reverend Frank Gavin had himself suggested such a work as early as 1916.