Although your message was posted a couple of years ago I have just seen it. Mary Wilder Tileston, nee Foote, was my wife's great-grandmother. We have a good deal of information about family history and genealogy and would be willing to exchange information with you. I note that you have Mary Wilder Foote's birthdate wrong. Perhaps you meant 1843 instead of 1943. Please confirm this.
We could also put you in touch with Elinor Horner (daughter of Mary Wilder Eustis) who is currently involved in building a family genealogy. Again, note that the name is Boies not Bois.
Thank you. We hope to hear from you and to exchange information that might be helpful to each of us.