Tom- You might check with the Cape Elizabeth Historical Preservation Society about the Phippen name The South Portland Historical Society may also have something- ask at city hall.
From Wm Jordan's - A History of Cape Elizabeth, Maine- At the beginning of the first Indian War, in 1675, called King Phillip's War, Falmouth,of which Cape Eliabeth was then an integral part, was enjoying a thrifty trade in fish, masts( for the King's ships), spars, timber, and sawed lumber. In Cape Elizabeth( then including South Portland), just prior to the outbreak of hostilities, the settlements were few and far between. The largest grouping was at Purpooduck, the area later called Spring Point( in South Portland)and consisted largely of the families of John Wallis, Joseph Phippen, Thomas Stanford, Robert Stanford, John Skillings, Joel Madiver, Issac Davis, Ralph Turner, Nicholas White, and Samuel Penley. The name "Purpooduck" is of Indian origin, meaning a place that conspicuously juts out into the water, and is little frequented.
Falmouth was the name of the" Greater Portland "area including So, Portland, Cape Elizabeth and Scarboro.
Hope this has been of some help- Lynne A. Jones Georgetown, Maine