Biggles In Spain
Written by
W. E. Johns
Copyright 1939
A single adventure serialized as Wings Over Spain over 11 issues of Modern Boy, #49 - #59, January 21, 1939 to April 1, 1939.
Taking place during the Spanish Civil War, Biggles comes down with a bad fever and is transported to a ship to get better. When the ship is attacked and sunk off the Spanish coast, he and friends barely make it shore where they decide to do a little spying for England.