Can we draw the following hypothesis from the context?

Context:

John Jewell Penstone (18171902) 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).

Hypothesis: John Jewell Penstone was the most famous member of the Pre-Raphaelite movement.
It's impossible to say