Could be the SP who gained MA from Christ Church, Oxford in 1716?
Foster: Palmer, Samuel, s. Sam., of London, gent. Christ Church, matric. 15 July 1709, aged 18; BA 1713, MA 1716; rector of Brampton Bryan 1721, and vicar of Leintwardine, co. Hereford, 1729. See Foster's Index Eccl.