The purpose of this investigation is to correct a geographic error introduced in Lucas’ The Pitcairn Island Register Book (hereafter Register Book) published in 1929 by the London-based Society for Promoting Christian Knowledge. The Register Book is an important secondary/primary source for scholars and enthusiasts interested in the early decades (1790-1854) of births, deaths, marriages and other significant happenings within this Anglo-Polynesian settlement on Pitcairn Island.