A fully recovered Dermer left Jamestown in May 1620 heading to New England to "accomplish what his last discovery had omitted". He met with the Dutch at Manhattan and warned them that they were trespassers on English claims, afterwards he went on to New England. Extracts from anotherthis letter written by Dermer on June 30, 1620 which appears in New England's Memorial, makes a prescient statement, "...I will first begin with that place whence Squanto, or Tisquantum was taken away, which in Captain's Smith's map is called Plimouth...I would that the first plantation might here be seated, if there come to the number of fifty persons or upwards..." Five months later, in November 1620, the [[Mayflower]] will arrive at the tip of Cape Cod, and then six weeks later, deliver 102 Pilgrims, who also possess of a copy of Captain Smith's map, to this very place where they will found the colony of [[Plimoth Plantation]], at the abandoned village of Patuxet.<ref>Extracts of Dermer's June 30, 1620 appear in New England's Memorial, Nathaniel Morton 1669; Morton had access to William Bradford's original manuscript and Bradford's complete letterbook. See: [[Of Plimoth Plantation]] for the story of the loss and recovery of the complete manuscript and partial letterbook.</ref>
