This work is an adaptation of "A Manual of Plainsong" which was originally authored by Henry Bremridge Briggs and Walter Howard Frere and was published in the year 1902. A facsimile of the original work is located at [http://archive.org/details/AManualOfPlainsongDivineService]. The original work is now in the public domain and was replicated by David Stone of Cambridge, United Kingdom, in a digital typeset. Stone's replica is located at [http://old.www.lithoi.org.uk/church/mop/mop.html]. This adaptation uses version 0.4.1 of Stone's work, copyrighted 2007-2009, which has been released under GNU General Public License, version 2 or later, or the Creative Commons Attribution ShareAlike license, version 2.0 or later. This adaptation is released under GNU General Public License, version 2 or later.