a1867C.J. AnderssonNotes on Birds of Damara Land (1872) 119The male sings very pleasantly; and his notes have been likened to the following differently intoned syllables, jan-fredric-dric-dric fredric, whence its colonial name of Jan frédric.
1896H.A. BrydenTales of S. Afr. 109You may see and hear the lively, inquisitive Jan Fredric thrush, with his pleasing song, and his curious note — ‘Jan-fredric-dric-dric-fredric.’
1923Haagner & IvySketches of S. Afr. Bird-Life 170The commonest member of the Robin-Chats is the ‘Cape’ species (Cossypha caffra) called the Cape Robin or Jan Fredric.
1936E.L. GillFirst Guide to S. Afr. Birds 64Cape Robin, Jan Frederik..Has a typical thrush-and-robin song, clear and ringing, delivered in phrases.
1983K.B. NewmanNewman’s Birds 324Cape Robin,..Has a pleasant and continuing song, each passage starting on the same note and with the phrase ‘Jan-Frederik’ often repeated.