I need copyright information

This is my first official plea for help as part of the project. I have a pdf copy of The Fessenden Family in America, and I have converted it into html format in Adobe. The problem is I don’t know how to contact the direct family members of Edwin Allan Fessenden (or his daughter, Mary Elizabeth Fessenden Washburn, who actually published the book) to get permission to make it available on the website. If someone in the family out there can get me in touch with the right people, we can make the book readily available. As soon as I get permission, I’ll put it on the project site here as both a PDF and html to make it easily accessible to the whole family.