Elliott O'Donnell (February 27, 1872 - May 8, 1965) was an Irish author known primarily for his books about ghosts. He claimed to have seen a ghost, described as an elemental figured covered wit... (more)

Elliott O'Donnell (February 27, 1872 - May 8, 1965) was an Irish author known primarily for his books about ghosts. He claimed to have seen a ghost, described as an elemental figured covered with spots, when he was five years old. He also claimed to have been strangled by a mysterious phantom in Dublin.
Later in his career, he traveled to the U.S. and became a police officer during the Chicago Railway Strike of 1894.
He also served in the British Army in World War I. His first book was For Satan's Sake, published in 1904.

Source: Wikipedia