Owner of extensive collieries in Monmouthshire and Pembrokeshire.
"One of the leading colliery owners at that time was Sir Henry Protheroe, who not only owned extensive coal land in Monmouthshire, but in Pembrokeshire as well. For the Penivan Coal Company's property he gave eight thousand pounds. He also made a railway,, and in this was opposed by Mr. Benjamin Hall, (Llanover), who obtained an injunction against it in Chancery.
Charles Wilkins, The South Wales Coal Trade and Its Allied Industries from the Earliest Days to the Present Time (1888) pp. 161-162, available at https://babel.hathitrust.org/cgi/pt?id=mdp.39015036673278&view=1up&seq=186&skin=2021 [accessed 07/12/2021]. See also http://www.welshcoalmines.co.uk/Gwent/Manmoel.htm [accessed 07/09/2020].
No firm notes