James Parker was English businessman, clergyman, and inventor who invented one of the pioneering new cements of the late eighteenth century.
There is evidence that the Wyatt "Roman" cement[1][2] was used in building the famous Bell Rock Lighthouse.
From around 1807 a number of people looked to make artificial versions of this cement (or more strictly hydraulic lime as it was not burnt at fusion temperatures).
Frost's patents were taken up by John Bazley White and Sons who supplied the cement to Isambard Kingdom Brunel for the Thames Tunnel.
Aspdin converted it to Portland cement production, and it continued in that role until closure in 1901, latterly under the name of "Robin's Works".