Walter Leighton was born in the year 1897, in Sussex, England. He studied in Oxford, before becoming an archaeologist in 1931. He was a very intelligent man, and had taken part in many expeditions in Egypt, but he was also very money-minded, and used to smuggle valuable artifacts in secret, to sell them to wealthy antique dealers. It was from this, that he came in contact with Bernard Miller, who paid him good money to give him some artifacts from his next expedition in Egypt.
Walter's final expedition was when he joined William Johnson (William the Thin) and Bartholomew Wedgewell, to find the lost tomb of Manhura. Once they had uncovered it, an evil curse caused the mummy to resurrect, which lead to the death of both Johnson and Wedgewell. Leighton was lucky enough to escape unharmed, taking with him a chest and a pocket watch, which turned out to be a time machine owned by Johnson.
The panic-stricken Walter returned to England, fulfilling his promise to Bernard Miller, to give him some artifacts.
Once he arrived at the door of Miller House, he explained to him that due to his massive hurry, the chest was the only artifact he brought with him. Bernard became angry with him, for not taking a key with him, in order to open the chest. In a furious rage, he told Leighton that he would force it open with explosives. Walter refused to let him do such a thing, fearing that it would damage it. Bernard was about to shoot him with his pistol, when an ancient Egyptian inscription magically appeared, floating in the air. Bernard read the inscription, which opened the chest, revealing another inscription which read;
"Greetings, master. We are your slaves. Ask and we shall obey you and you alone!"
Bernard then ordered the chest to kill Leighton. His soul was then trapped in the chest, and he joined his fellow colleagues of the expedition, as a slave of the chest.