Here’s an ad from the February 27 1929 edition of the Toronto Daily Star for a long-standing Toronto-based bread company.
I looked up Lawrence in the 1884 Toronto city directory (on the assumption that if the Lawrence brothers started their firm in 1883, they might not have made it into that year’s directory). Sure enough, George and James Lawrence were there:
16 Lisgar Street, where the brothers lived in 1884, is of course now a condo.
Lawrence Bakery had existed for 46 years in 1929, and was listed in the 1929 directory at 17-31 Carr Street, but they weren’t there for very much longer: they were in the 1930 directory, but the 1931 directory lists the Purity Bread Company at that location. 17 to 31 Carr Street has been townhouses for quite some time.