I too am interested in this fascinating ancestral line and resolving questions regarding Mary Phippen. I would look forward to assisting in research to improve her profile in collaboration with Profile Managers and possibly as a "Name Study Project." I am a direct descendant of John Wallis II and Mary Phippen via two different branches, i.e. through two of their children: son James Wallis, who married Martha A. Stanford, and daughter Dorcas Wallis, who married John Lane. Each of these two "twigs" intersects with the same Lane branch about 120 years apart. Interesting that another daughter of John and Mary (Phippen) Wallis II, namely Elizabeth, married (1701/02) Joseph Morgan, son of Samuel Morgan (and 1st wife Elizabeth Dixie), the same Samuel Morgan to whom mother Mary (Phippen) Wallis married eight or so years earlier. That means that Elizabeth married her step-brother. Elizabeth and her two children were killed by Indians in the Purpooduck (now Cape Elizabeth, Maine) Massacre (August 10, 1703). At the time of Elizabeth's marriage to Joseph Morgan, mother Mary (Phippen) (aka Wallis, Morgan) had already been married to a 3rd husband, John Black, for a couple years, Mary's three marriages occurring about 2 years after each husband's death. I do not see any sources, however, that support a 4th marriage to a husband with surname Shepard, but this should be ruled-in (and merged) or ruled-out, since this vital info. appears in a WikiTree profile. Thank you for your question.