Josiah Whymper ran a successful engraving business in London, later with his son Edward.
Since both Josiah and his son Edward often just signed themselves Whimper or Whymper it can be hard to tell who did a particular piece, but after 1880 or so it was much more likely to be Edward. In addition, Whymper Sc. is almost always Josiah, according to Engen's Dictionary of Victorian Wood Engravers.
As well as being a respected engraver Josiah also exhibited his paintings at various well-respected national galleries.