1920 Toronto City Directory
Diplock, Wm, presser, Lowndes Co., Ltd., bds 63 Gould
https://archive.org/details/torontocitydirectory1920/page/734/mode/1upLooking near the beginning of the directory (for alphabetized street names)
63 Gould Street - Working Boys Home
Using the alphabetized page for Gould Street, I looked for a neighbour of 63 Gould and then searched the 1921 census for James L Rose, 55 Gould, hoping that Wm. was shown on the same census page.
Mr. Rose is listed in the 1921 Toronto census. Listed under his name is William Smith - 63 Gould, with numerous names under his. Wm Diplock is not one of the names.
Perhaps William left the boys’ home prior to the 1921 census. Perhaps he didn’t remain in Toronto.
Added:
1921 Toronto City Directory
Wm. Diplock, bds 63 Gould
https://archive.org/details/torontodirec192100midiuoft/page/738/mode/1upAlso listed
Chas. Diplock, Can Natl Carbon Co. lvs 55 Ward
Note: I tried searching for Charles on the 1921 census before searching for Wm. and also was not successful. If I remember correctly, a Clarence Goodden lived at that address in 1919 and was on the 1921 census image, but Chas. was not shown on the census image.
The men are not in the 1922 directory.
https://archive.org/details/torontodirec192200midiuoft/page/820/mode/1up