After posting my inquiry last evening, it came to me that finding three pieces, all by the same hand, could imply that a studio somewhere in the area handled work by that particular artist. This morning I made a few calls and, sure enough, it turned out that the artist is Gamble Hall of the Gary Zack Studio in Saratoga Springs, NY.
I apologies for wasting band width to request help when I should have been able to find the information on my own.