John Jewell Penstone (1817–1902) was a portrait and genre artist who worked with paint, but is known mainly for his engravings, and has been associated with the Pre-Raphaelite movement. The National Portrait Gallery has two of his stipple engraving, and a lithograph (printed by Nosworthy & Wells).
John Penstone was a portrait artist who worked with paint on canvas, but is known mostly for his engravings. 
It is not specified whether the paint was on canvas. 