Sven: I agree with Canoe Brook being "vague" and haven't seen anything in writing (GI, American Golfer, etc), but Frank and Paul list as 1922 and until I can refute them I'll keep it in the NLE columns as an Alison 1922/23 design.
Sinclair: If you note I list C&A or CM&A or just Colt (prior to WWI). See Port Huron Golf Club (my course) where I list CM&A/C&A. I do that because the firm from 1920 incorporation thru 1922, and maybe 1923 kept up the sham that MacKenzie was a part of the show. I do not list him after 1923 and I'm heading toward after 1922. At PH, Alison's first course design in NA, I list CM&A because the firm was brand new and Alison's letters, and firm letterhead that I've seen, definitely list MacKenzie both on the masthead and individually. However, after 1923 the letterhead and advertising say C&A. IMO Mackenzie did no work with Alison or for the firm in NA and was basically in competition with his own (ostensibly) partners. At Port Huron the 1928 archive has letters which list C&A as the firm with CA&M(orrison) listed as partners and Lavis as the American Partner and Martin for the "Continent of Europe." Port Huron also has pre-printed white line blue prints with C&A as the architects, even as Morrison is listed as full partner under C and A on the letterhead. The PHGC letters are dated from September 7, 1928 thru November 16, 1928. One of the drawings is hand dated October 23, 1928.
Therefore IMO the clubs in NA that trade on Mackenzie's name along with C&A are kidding themselves. I believe that they can easily say C&A knowing Alison was the sole designer of their course because 1) that was the firm name and 2) he definitely started at the master's feet. But clearly was on his own in NA even in the redesign of Colt originals ie. Toronto and Ancaster.
Tony