Hugh and Ann are in the 17 June 1870 census of Raymond Township, Stearns County, Minnesota. He is 45 and she is 35. Living with them is Catherine Rooney (Mammy Kitty), age 85.
Hugh and Ann are in the June 5, 1880 census of Miles City, Custer County, Montana. He is 53 and she is 37. Living with them is Joe Rooney, age 11, who was born in "Dakotah" and his parents in Spain. He was either an adopted son or foster child. Hugh and Anna had no children themselves.
Hugh's last will & testimony was signed on 17 June 1880 in Miles City, Montana. On 8 Nov 1880, a probate judge signed off on Ann Rooney being the executor of the will since Hugh was deceased. The exact date of Hugh's death is unknown at this time. No death or burial information has been located.