BCrosby,
After thumbing through "The Toronto Terror", I have to concure with Jeff Mingay, Barclay (the author) shows no record of the nature of the renovation to Hyde Park. However, he notes that a 1926 advertisement, Stanley Thompson indicates that he remodeled the course. Hyde Park has no record of these renovations, but it is noted, they have few records at all.
Interestingly, Thompson had expanded his operations into the United States by this time, and had opened a branch office in Jacksonville, Florida by 1925. Thompson was busy in this area at the time, making renovations at Floridale GC in Milford, Fl. (NLE) in 1925 and the design of a 27-hole layout in Jacksonville, Fl., the Neilhurst G & CC (NLE) from 1924-25. Therefore, it is not unlikely that he did work at Hyde Park, unfortunately the quantity of work done is unavailable.