Bought a month ago, this went straight away to be remounted. The original mount was the most amateurish effort with packaging tape ... on top of which was a Bonham's sticker. Now mounted with acid-free museum paper and AR glass with all the bells and whistles this little study should be good for a century or more.
Roland Vivian Pitchforth was a British war artist and Royal Academician. He spent time in North Africa in the second world war and my best guess is that this little ink study of local fishermen and porters dates to then.