Unlike Willie Davis who was one of the first Scots to ply his trade in the U.S., Arthur Fenn was a homegrown product born in Waterbury, CT.
Fenn's first courses came during the 1896 - 1900 era, a time when hundred's of golf courses were being laid out, often by what we would consider "name" architects, but often by a landowner or a club committee. Cornish & Whitten note Fenn as one of the "professional" architects of that era, leading one to ask how he stumbled into this line of work.
Here's a most likely incomplete list of his work:
Waterbury (1895)
Poland Spring (1896)
Allston (1896)
Portsmouth Naval Yard (1896)
Bristol (RI) (1896)
Oquossoc (1899)
Fall River (1899)
Profile (1899)
Crawford House (1899)
Twin Mountain House (1899)
Fabyan House (1899)
Bryn Mawr (1899)
Waumbeck (unk)
Abenaqui (NH) (unk) (Harper's attributes this course to Alex Findlay in 1899)
CC of Farmington (CT) (unk)
Palmetto (unk) (it has been proposed that Fenn did some work on the original course)
If anyone has any other attributions to Fenn or any other information about his life, I'd greatly appreciate hearing about it. Quick searches on this site and on Google provide some basic insight, with this old thread perhaps being the most comprehensive:
http://www.golfclubatlas.com/forum/index.php/topic,18938.0.html