His medal would have been inscribed as being a Lieutenant with the 2nd (S.S.) RCRI, = the 2nd (Special Service) Battalion, Royal Canadian Regiment of Infantry, but if you notice on the right side of the page where he signed for the medal in September 1901, he’s put: FD Lafferty Lt & BT Capt RCA [BT Capt = ? Battery Captain, officer in charge of battery]. So like many officers in both British and Colonial forces looks like he volunteered for service in South Africa with the “new” battalion of infantry it needed officers or because there were no vacancies with the small group of the RCA of the Canadian contingent.
That appears to be supported by:
The Times, Saturday, Dec 01, 1900; pg. 12
The Queen and the Canadian Contingent – Windsor 30 Nov
The article describes the inspection of the Canadians at Windsor and mentions officers being presented to the Queen, included was Lieutenant F.D. Lafferty, Royal Canadian Artillery.
For more background see http://www.angloboerwar.com/canadian-units
You can also check the Army Order 94/1901 that gave the conditions for the award of the various clasps he was awarded via the site.
Post Boer War.
The Times, Monday, Jan 02, 1911; pg. 6
Describes the content of army orders listing officers who had passed the final examinations, under Ordnance Course it lists Maj. F.D. Lafferty R. Canadian Artillery.
It goes on to list officers who will form the advance class whose studies “commenced to-day” and includes, Maj. F.D. Lafferty, R. Canadian Artillery (attached).
The Times, Monday, Feb 05, 1912; pg. 4 – Ordnance College.
He’s included in the list of officers who had passed the final examination of the Advance Class.
If you can’t access the London Times contact me at jeffp dot h at bt [no space] internet dot com.
From a simple web search I found that in 1915 he was Lt Col FD Lafferty RCA and a member of the “Shell Committee” whatever that was. I would think you could obtain his full biography and service history from the Canadian Archives or the Royal Canadian Artillery Museum.