From the February 6, 1913 New York Times:
ANN ARBOR, Mich.–The brain of a dog was transferred to a man’s skull at University Hospital here to-day. W.A. Smith of Kalamazoo had been suffering from abscess on the brain, and in a last effort to save his life this remarkable operation was performed.
Opening his skull, the surgeons removed the diseased part of his brain, and in its place substituted the brain of a dog.
Smith was resting comfortably to-night, and the surgeons say he has a good chance to recover.