I'm not related to this family just took a gravestone photo. If you are a member of or become a member of findagrave.com (it's free) I'd be happy to transfer management of the webpage of Samuel and his family to you. I would need your member ID# to do it. You could just send a request from his webpage. If don't want to do that and have more info to add just send me a message with the info.
I looked at your tree and I also think I can help with some of the Massachusetts vital records for this family.