In 1848, William Planter and Samuel Q. Porter purchased the Stone and Carrington paper mill in Unionville. They soon built another mill and in 1860 organized the Planter & Porter Manufacturing Company, which produced fine writing paper and book paper. As one of Unionville’s largest employers, they needed housing for their workers and erected at least five rental houses in the neighborhood. They erected the rooming and boarding house at 28 Elm Street in 1854. Franklin C. Chamberlin, a Hartford lawyer, bought the building in 1878 and continued to rent its rooms out to local factory workers. In 1889 the house became the residence of Thomas Mulrooney, an Irish immigrant who worked at the American Writing Paper Company (which had acquired Planter & Porter in 1877), and his wife Mary Jane Mulrooney, who was born in Burlington to Irish immigrant parents. Mrs. Mulrooney rented out rooms in the house to supplement the family’s income. The house remained in the family until 1941.
