[2] Warren had built many other important buildings in Bristol for the DeWolf family, who rose to prominence through wealth gained from the Atlantic slave trade.

Josephine Gibson married a Mr. Knowlton and made Longfield a center of social and artistic gatherings until her death in 1969.

[2] Knowlton built an adjacent home and bookbindery, named Longfield Studio, on the property at 1202 Hope Street.

[5] Various owners announced intentions to convert the property to a single-family house, a "green inn", a place for weddings and functions, or an artists' residency.

According to a National Park Service survey, the foundation of the house is of stuccoed stone and the walls are constructed of wood clapboards.

[2] Josephine Gibson Knowlton and Andrea Hurley recorded the history of the house and the family in a number of books.