You can find some info on Thomas and Walter Abbot in Old Kittery and Her Families by Everett S. Stackpole originally pub. 1903 - reprinted 1981. Also Genealogical Register of the Descendants of George, Arthur, Robert and Thomas Abbot pub. 1847. Old Kittery should be available through lending library. Not sure about Gen. Reg. Hoping to release it on CD-ROM sometime next year.