Do you recognise our Wheal Ocean watercolour?

Wheal Ocean watercolour
Wheal Ocean watercolour

Everyone at St Agnes Museum is thrilled to have acquired this exceptionally rare watercolour, dated 24 July 1858, of Wheal Ocean perched on a rocky ledge “on Trevellas Point in Trevaunance Porth”.  In the Royal Cornwall Gazette of 23 March 1849 there is mention of an engine “successfully put to work” at Wheal Ocean, the engineer being Mr T James of St Agnes.  

The watercolour is unsigned and the Museum would love to uncover the identity of the artist. Can anyone help?