Cowan, J. 'Famous New Zealanders, No 13: Edward Tregear, pioneer, scholar, humanitarian'. New Zealand Railways Magazine 9, No 1 (1934): 17–21

Howe, K. R. Singer in a songless land. Auckland, 1991

McKenzie, T. 'Edward Robert Tregear, 1846–1931.' Kōtare 7, No 3 (2008): 30–39

Reeves, W. P. 'Letters written from 1895 onward, by men of mark in New Zealand'. qMS. WTU

Tregear, E. Papers, 1872–1918. MS Papers 554. WTU