In the early years of the 20th century, Sawyer expanded his practice with the construction of the White Oaks Sanatorium immediately south of Marion, Ohio. The sanatorium's name was derived from the White Oaks Farm, which the Sawyers purchased and used as the location of their new facility. White Oaks was a compound of buildings which enclosed a courtyard. Buildings included patient wards, called cottages, which were located inside the cloister. Buildings ringing the outside of the cloister included a Nurses dormitory, administrative offices, dining hall for patients who were ambulatory, sterile surgery, physical rehabilitation building, facilities for dental work and doctors offices.