After his wife's death, Cass lived with his step-son, Charles Hood Williams, until his death. Cass was confined to the house, and later to his room, due to his poor health, which was mostly caused by asthma. He was visited by Dr Thomas Hocken in 1894 for an interview, and at the time, Cass was bedridden, deaf, and repeated himself much. Cass died on 17 April 1895, and was buried next to his wife at Barbadoes Street Cemetery.
