On the west side of Mt. Airy, a subdivision spanning Wisconsin Avenue laid out in the late 1890s, a dense, working-class neighborhood grew where policemen and dairymen lived in modest houses. Among them, the Perna and Porto families gave Tenleytown five generations of building tradesmen. Stone mason Frank Perna arrived from Italy in the late 1880s to work on federal construction projects, and twenty years later his brother Louis joined him. They formed Perna Brothers in Tenleytown, near both raw materials and the demand for new housing. Their sister Anna Maria married Benjamin Porto, also a stone mason. The Pernas and Portos, and their descendants, worked in stone and construction, building entire houses as well as fireplaces, walls, and foundations. Their work can be seen at 4619 and 4621 42nd Street and on Chesapeake Street at 4112-4118, and they also worked on the Washington Monument, St. Columba's Episcopal Church, and buildings at Glen Echo. The Portos constructed 4319 Ellicott Street, among other houses. Although Washington's small Italian community centered downtown when Frank Perna arrived, shoemakers Giovanni Errigo and Tony Bredice and barber Frank Errigo also found opportunities in Tenleytown. Around 1912, builder, former Marine Bandsman, and second-generation Tenleytowner Frederick W. Parks built a double house for his family at 4115 Chesapeake Street, where three more generations lived until it was razed in 1962.