Lyman Family Genealogy Forum
I assume you have checked out http://www.whitneygen.org/archives/extracts/pierce/p161-165.htm
Looks like our families are further apart than we thought. My Whitneys descend from John-Thomas-Thomas-Benjamin-David-Silas-Oliver-John-Nathaniel Stevens. Yours are John-Richard-Moses-Moses-Aaron-Aaron to your Susanna Willard Whitney. The other Susanna Willard Whitney was a sibling who died in infancy.
Couldn't connect to your e-mail address for some reason. Check out the McCord site - you will see Willards in the photo archives - perhaps that was the closer Montreal connection. Lets keep in touch & share relevant info.