BGMI, Nov. 8, 2007 (Ernle, Baron (1851-1937); Ernle, Baron Rowland Edmund Prothero (1851-1937); Ernle, Lord (1852-); Ernle, Rowland Edmund Prothero (1851-1937); Prothero, Rowland Edmund (1851-1937); Prothero, Rowland Edmund (1852?-1937))
His The light reading of our ancestors, 1921.
LC database, Nov. 8, 2007 (usage: Lord Ernle, Rowland E. Prothero, Lord Ernle (Rowland Prothero))
Oxford DNB, Nov. 8, 2007 (Prothero, Rowland Edmund, first Baron Ernle; b. Sept. 6, 1851, Clifton upon Teme; d. July 1, 1937, near Wantage)
WBIS, Nov. 8, 2007 (Prothero, Rowland Edmund baron Ernle; b. 1851; d. 1937)
Wikipedia, Nov. 8, 2007 (Rowland Prothero, 1st Baron Ernle; Rowland Edmund Prothero, 1st Baron Ernle; b. Sept. 6, 1851; d. July 1, 1937; British administrator, author, and politician; raised to the peerage as 1st Baron Ernle in 1919; barony became extinct upon his death)