These stone cottages at Coulsontown were built between 1850 and 1860 by Welsh immigrants from North Wales who came to quarry the world famous Peach Bottom slate, using Cardiff Conglomerate stone quarried from the nearby ridge and constructing homes like those in the slate quarrying regions of North Wales, complete with original slate roofs. Peach Bottom slate, used mostly for roofing, was considered the best roofing slate in the world and won a medal for durability at the London Crystal Palace Exhibition of 1851. The cottages' interiors remain virtually original, with a fireplace for cooking and heat, a kitchen as the family gathering place, a first-floor room that served as the adults' bedroom and parlor for special occasions, and two upstairs bedrooms for children. David Williams and his family were the first known occupants of the left cottage, No. 28; he emigrated from Penrhyndeudraeth in 1851 and worked all his life as a slate quarryman. His experience reflected that of many Welsh immigrants who sought a better life, escape from oppressive English aristocratic rule, religious freedom from conformity to the Church of England, and relief from unemployment, starvation, and disease in Wales. In America they faced hard and dangerous quarry work, where injuries and death were common, but through hard work and perseverance they built better lives and left a legacy seen in enduring slate roofs, the Rehoboth Welsh Church, these cottages, and intricately carved slate tombstones in nearby cemeteries. The cottages are listed on the National Register of Historic Places.