363-364 High Street, also known as Marchmont House, was constructed as a substantial town house during the mid 18th century, at a time when the suburb of Wigford was attracting investment from wealthy mercantile families. Little is known about its early history. It appears to have been extended to the rear (east) sometime during the early to mid 19th century. The principal building had reached its current size by 1887, at which time the house retained a rear garden. By 1926, the ground floor had been converted into a shop, and the building had been subdivided into two properties by 1930 (the two events may have coincided). Between the 1930s and 1960s, a single-storey outbuilding had been constructed over the rear yard of the building, while the shopfronts were replaced in the later 20th century. The building is constructed of red-brown brick with stone dressings, with a timber doorcase and a roof covering of slate. It is of two storeys across five equal bays which face onto High Street. For the full description and the legal address of this listed building please refer to the appropriate entry in the National Heritage List for England. {1}{2}