The Original "Bourne Identity"

Ansel Bourne 

Among the first documented cases of this curious strain of amnesia was Ansel Bourne, 19th century evangelical preacher of Rhode Island who turned up in Pennsylvania as a confectioner with the name A.J. Brown after two months of being in a supposed fugue state. While under hypnotic suggestion, it was observed that he could assume either identity without either having any idea of the other existing.