I'm also researching the Warren family of Hiram. Susan Adams is the daughter of William Adams from his second marriage. Susan's mother was Rebecca Elwell. It is my understanding that Susan was born in Buxton as were all the other children of William and Rebecca Adams. His first wife's children (Suzanna Brown) were born in Gorham.
I believe that Susan's half brother married her husband's (John Warren) sister.
I would be interested in sharing information with you.