His Dismal England, 1984 CIP t.p. (Robert Blatchford)
LC data base, 3/9/84 (hdg.: Blatchford, Robert, 1851-1943)
His Merrie England, 1893 t.p. (Nunquam)
DNB, 1941-50 (Blatchford, Robert Peel Glanville, 1851-1943; journalist, author, and socialist)
Lobies, J.-P. Index bio-bibliographicus notorum hominum (Blatchford, Robert Peel Glanville; pseud.: P. Macginnis, Nunquam; 1851-1943)
Bohemian girl, 1898 t.p. (P. McGinnis)
Oxford dictionary of national biography online, 17 July 2015 (Robert Peel Glanville Blatchford, journalist, author; born 17 March 1851 in Maidstone; died 17 December 1943 in Horsham, Sussex; penname Nunquam Dormio (I never sleep) or simply Nunquam; started The Clarion, a socialist weekly newspaper)