north from the crest of “Quaker Hill”, which he subsequently renamed “Camel’s Hump” (or "Camels Hump") after the shape of the two small peaks. The joined properties he acquired became known as “Camel’s Hump Farm”, and, by the 1930s, included over 900 acres (360 hectares). Construction on the Curtis Lovelace-designed home began in 1921. The general contractor, including masonry and carpentry, was F.F. Speck Construction Company of Walnut Street. The painting contract was let to Frank Mitman of West Broad Street, and brick and stucco work to Morris Brewer of Broadway. The construction cost was $65,000. The family occupied it in 1923. The three-story, 22-room, 6,000-square-foot (557 m sq) Adam-style Colonial Revival mansion was situated on a bluff over the Monocacy Creek. Bethlehem Steel beams were used in the construction of the building and, based on earlier experiences with house fires, the building had a fire suppression system throughout all three floors. Johnston used his engineering skills to landscape and hardscape the grounds of the estate. Steel beams were used in structures throughout the main property. He also planned a system of paved roads and horse trails throughout the grounds. He constructed bridges and rerouted and walled portions of Monocacy Creek. Johnston died at the family home on February 1, 1948. Camel's Hump Farm Based on a map commissioned by Archibald Johnston in 1929 and printed privately for his family in December of that year, the family's property comprised over 500 acres (202 hectares). The approximate northern border follows Pennsylvania US Route 22 from Township Line Road to its junction with Pennsylvania Route 191/Nazareth Pike. The eastern border was Nazareth Pike/Linden Street. The southern border followed the ridge of Camel's Hump from Linden Street to Altonah Road. The western border was Altonah Road and Township Line Road. The majority of the property was in Bethlehem Township (Northampton County), with the southern portion within the Bethlehem city limits. The property had a system of paved roads and bridges connecting the residences, outbuildings, and features. One road left Santee Mill Road just east of the mill, roughly following Monocacy Creek. On the east side, it forked, with the southern branch leading to the "Blue House" residence, another residence, and the swimming pool complex and bathhouse. The northern branch continued along Monocacy Creek past the boat house to the spring and pump house, where it switched back and climbed the hill to the