four o'clock
He promised to be on hand within an hour . It then lacked a few minutes of three o'clock in the morning . Next at Bentley 's suggestion -- and he talked quickly and eagerly to keep his mind off the ordeal he knew he was facing -- Tyler got the curator of the Bronx Zoo out of bed and asked him to wait upon Doctor Tyler immediately . At four o'clock Doctor Jackson and the curator entered the room where Surgeon Tyler had performed a miracle . Doctor Jackson stepped back in amazement when he noted the manlike ape which leaned with arms folded against one wall of the operating room . His eyes were big with amazement . He studied Bentley for several minutes , while no one spoke a word .