[2] In Milwaukee he worked as a "carpenter and master workman," working on the old city hall, St. Gall's Church, St. John's Cathedral, and Holy Trinity Roman Catholic Church (Milwaukee, Wisconsin).
[2][4] Historian Alexander Carl Guth calls Douglas "a very emotional man, likewise...very pompous and always on his dignity, both in manner and dress," and relates an anecdote in which "a stranger came to [Douglas'] office looking for a prominent architect by the name of [Henry C.] Koch.
Douglas straightaway disclaimed all knowledge of such a man and informed the stranger that he was now standing in the presence of the most eminent architect of the day and that he had better take due heed of same.
It is needless to say that this stranger was none other than a prospective client for Koch, but Douglas made such an impression on the man that he rightway [sic] engaged him as his architect.
"[2] A number of his works are listed on the U.S. National Register of Historic Places.