Gregory was born in Devonshire, England, in 1829. He became a renowned physician as well as a researcher of the paranormal world. He was considered one of the top scientists of his day. He married a woman named Patricia Heathering, who gave birth to a daughter, Helen, in 1850. Helen followed in his footsteps as a doctor, and after she was denied any opportunities to actually practice, was introduced to the world of the abnormals by him. He disappeared during an expedition to Mecca in 2350; Helen believed him to be dead.