http://www.bac-lac.gc.ca/eng/Pages/home.aspx
http://www.collectionscanada.gc.ca/l...ent&mediaType=
This query was for 'Sherbrooke' and 'Regiment' after a few attempts gave nil responses. The MIKAN number is the code I couldn't remember. I hope I was not too misleading or vague. Once you find the terms that work, keep going. However, author Hal Skaarup states the cataloguing is not as complete as we would hope, so persevere and see what turns up.