I am also researching this Freeman Cary, as his son Elmer Levi Cary ties into the Hemenway line. Have you been able to find his parents? I think they may be John & Nancy Allison, Nancy married 1st Calvin Hopson, 2nd John Cary, 3rd William Strong.
Elmer & Mary are brother & sister and I have pictures of them both.
Do you know Freeman's parents, grandparents and back, am trying to tie them into the Cary/Carey's of America.