Me pēnei te tohu i te whārangi:

Herbert Roth. Related biographies for 'Black, William Pierpont', Dictionary of New Zealand Biography, first published in 1996. Te Ara - the Encyclopedia of New Zealand, https://teara.govt.nz/mi/biographies/3b35/black-william-pierpont/related-biographies (accessed 28 January 2021)