Premise: John M. Donaldson (January 17, 1854 – December 20, 1941) was an American architect and artist born on January 17, 1854, in Stirling, Scotland. Donaldson was principal designer of the successful Detroit-based architectural firm Donaldson and Meier from 1880 onwards.
Hypothesis: Donaldson worked for a number of companies before becoming the principal designer for Donaldson and Meier.