Born in 1873, probably in Exeter, Albert Moulton Foweraker soon became a prolific British artist of some renown. He travelled frequently to Spain during the early 1900s producing a large number of atmospheric landscapes and paintings of local scenes. As far as I can make out he never visited Gibraltar - at any rate I cannot find any which depict Gibraltar scenes other than his picture of the Rock from Algeciras.
Pola - Algeciras
Gibraltar from Algeciras