The Sheikh And The Greek
Written by
W. E. Johns
Copyright 1933
11th of 13 stories in . It was published in Popular Flying Magazine, May 1934. It was republished as Tricksters of the Red Sea in The Modern Boy #383, Jun. 8, 1935.
When Biggles learned that the fellows mentioned in the title had cheated him in the sale of some pearls, he decides to get even.