I think we're going to need to concentrate our image search on the late 1870s and early 1880s for the location you want. Here are some of Angus S McDonald's entries in the CDs:
1875 A S McDonald, mfr and dlr in boots and shoes, 104 Main
1878 A S McDonald, boots etc, 34 Spring
1879-80 A S McDonald, boot and shoe dealer, 34 Spring
1881-82 A S McDonald, boots and shoes, 34 Spring
1883-84 A S McDonald, manufacturer and dealer boots and shoes, 46 N Spring
1887 A S McDonald, boots and shoes, 46 North Spring
1890 as McDonald & Fisher with Charles L Fisher, 46 North Spring
1891 & 1893 Angus S McDonald, boots and shoes, 118 North Spring