The Royal Military Calendar, Or Army Service and Commission Book: Containing the Services and Progress of Promotion of the Generals, Lieutenant-generals, Major-generals, Colonels, Lieutenant-colonels, and Majors of the Army, According to Seniority: with Details of the Principal Military Events ... edited by John Philippart. Published by Printed by A.J. Valpy, sold by T. Egerton, 1820:
http://books.google.com/books?id=bNbre3lCAawC&pg=PA48
will clarify the situation.