Baby Fae body began generating isohaemagglutinins, but a suitable donor could not be found in time. Prior to the procedure, no infant heart transplant—even with human hearts—had been successfully performed due to a lack of infant human hearts. To address this issue, Bailey had become a pioneer in the research of cross-species heart transplants, which had included "more than 150 transplants in sheep, goats, and baboons". Multiple surgeons had previously experimented with baboon heart implants, leading some to speculate even that baboons could be farmed in the future for such purposes. When asked why he had picked a baboon over a primate
Jack (baboon) was initiated after a concerned member of the public reported that a baboon was observed changing railway signals at Uitenhage near Port Elizabeth. After initial skepticism, the railway decided to officially employ Jack once his job competency was verified. The baboon was paid twenty cents a day, and a half-bottle of beer each week. It is widely reported that in his nine years of employment with the railroad, Jack never made a mistake. After nine years of duty, Jack died of tuberculosis in 1890. Jack's skull is in the collection of the Albany Museum in Grahamstown. Jack (baboon) Jack (died