The Coal Authority map shows a level a this location as ‘Havod Trislog Sir Henry’

Hafodrisclawdd-Isaf level was owned by Sir Henry Protheroe, and began work in the early 1800s.

This was the first incarnation of a number of pits which came to be known as Manmoel Colliery under Protheroe’s estate.

The mine worked the Mynyddislwn seam.

In 1812, a tramroad was commenced from ‘Carn Brook’ to serve the colliery.

Sir Henry Prothero is listed as High Sheriff of Bristol in 1807.

Dodsley’s annual register by Edmund Burke (for 1816) then lists Sir Henry Protheroe of Llantarnam Abbey as Sherriff of Monmouthshire (though I have been unable to find the original document online).

Sources suggest J P (or T P) Price took over the mine after Protheroe’s death in c.1840

A document titled ‘Newport Chartists vol 6 P.137’ summons ‘Hananiah Morgans, Havod yr ishclod’ to be questioned in Newport, in connection with the Newport Chartists Rising in 1839.

Reports are very rife here that there will be another “Rising” and that the men meet underground - the people here think there is something in it and that some further mischief is brewing. Yours very faithfully Thos M Lewellin

Research Courtesy of user SJT