Who designed the original “Pine Tree Point” house on Point Marguerite/Point Anthony at Alexandria Bay in the Thousand Islands, New York? John B. Taylor commissioned the imposing stone summer cottage in the early 1920s. It might have been Rich & Mathesius, since the firm referred to Taylor projects in 1920 and 1921.
The building seems to have burned several years after Taylor sold it. The current Pine Tree Point is a relatively recent replacement.
Version 6.3 of the list (pdf) has been posted. It contains a few changes and corrections.
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[Update 03.07.2013: Broken link to resort replaced.]
[Update 01.09.2011: Charles A. Rich definitely designed Pine Tree Point.]