Atkinson, M., Hardwicke Drummond Rawnsley, 1851-1920, M.Phil. thesis (Lancaster University, 1993) (view full text)

McGaffey, B. A. K., Three Founders of the British Conservation Movement, 1865-1895: Sir Robert Hunter, Octavia Hill, and Hardwicke Drummond Rawnsley, Ph.D. dissertation (Texas Christian University, 1978)

Robinson, S., A Victorian Legacy: Sir Robert Hunter, Octavia Hill and Canon Hardwicke Rawnsley and the Birth of the National Trust", B.A. dissertation (University of Hull, 2025) (view full text)