Here is a small list of building we know where design by H.P. Alan Montgomery _and_ John T. Riggs in New York City. List may be incomplete.
More buildings built by H.P. Alan Montgomery & John T. Riggs on Histograd
On list
On map
Street view
New York Map
2 items in this list for New York City, viewed 1719 times
New York Architecture
Any Manhattan adress on a 1885 map
