Additional informations:
James Caulfeild, 1st Earl of Charlemont, 1728–99. The Volunteer's Companion; Containing the Description of a Firelock, Position of a Soldier under Arms, Directions for the Manual Exercise, &c.. Dublin. 1784. [4], vii, [1], 80 p., plates, tables. :
Gale: Pdf reproduction of original from National Library of Ireland.
Book reprinted by The King’s Arms Press & Bindery:
https://kingsarmspress.com/product/the-volunteers-companion-1784/
Author Bio: James Caulfeild, the Earl of Charlemont: Portrait of an Irish Whig Peer by Janice C. Vaudry, Department of History, McGill University (Montreal), July, 1988:
http://digitool.library.mcgill.ca/webclient/StreamGate?folder_id=0&dvs=1570064312400~699

Thomas MaeNevin, History of the Volunteers of 1782, Dublin, 1845. 259 p. :
https://archive.org/details/historyvoluntee00macngoog
http://books.google.com/books?id=5-8DAAAAQAAJ