In the 1880 US Federal Census for St Paul, Ramsey, Minnesota, 42-year-old Canada-born steamboat engineer Thomas and his 36-year-old Wisconsin-born wife Eliza A [Griggs] Connolly have in their household their Minnesota-born children, 14-year-old Kittie, 12-year-old Lottie, 6-year-old Frank, 4-year-old Grace and 7-month old Guy. Also in this household are 22-year-old Canada-born teacher Melissa E Tice (no relation), Thomas' 37-year-old Canada-born sister-in-law Anna Mardey [?] and her two Minnesota-born children, 12-year-old Walter and 8-month old Blanche Mardey [?]. This household is living on Washington Avenue. Kittie, Lottie and Frank have attended school in the past year. Thomas' father was born in Ireland and his mother in New York, Eliza's father was born in New York and her mother in Ohio, and the Connolly children's father was born in Canada and their mother in Wisconsin.