Old Mike was a companion of Alexandre's. When Devitt investigated Alexandre's house, he found several letters mentioning Old Mike, which probably had been written by Wright or Anthony. The letters mentioned that Old Mike had become terminally ill and eventually died. When Devitt dug up Old Mike's grave, in order to unravel more of Alexandre's past (and his own), he discovered that Mike was part human and part ape. In a way, his transformation was similar to that of Brighid Laidcend's aunt, who had transformed into some sort of bird-chimera. However, the method of transformation was likely to have been quite different.