McCarthy's From Ireland - Illinois, Cook County Deaths, 1878-1922, digital images, FamilySearch Internet, certificate for Dennis J. Mackey, no. 20255, 04 Aug 1910.

Illinois, Cook County Deaths, 1878-1922, digital images, FamilySearch Internet, certificate for Dennis J. Mackey, no. 20255, 04 Aug 1910.

See:

Dennis J. Mackey
Joseph Lester Mackey