Southfield is noted in the
Ordnance Survey name books for Midlothian as the country seat of John Croall in the 1850s. Southfield House (1875) was designed by Scottish architect
John Chesser (1819–92) in the
Scottish baronial style for coachbuilder
John Croall to replace a previous house. The sandstone building, with its
French Gothic detailing, was category B listed in 1996. Southfield was converted to a
tuberculosis sanatorium in 1902 and became part of the
Royal Victoria Hospital in the 1920s. Case notes for patients treated in Southfield Sanatorium are held by the Lothian Health Services Archive at the
University of Edinburgh. The records show most patients stayed for a period of several months of treatment for forms of tuberculosis. == References ==