In The Trick That Failed, Flight Lieutenant Rosten was an R.A.F. accounts officer who had absconded with the payroll of an R.A.F. station, a sum amounting to some £12,000. Rosten escaped to France. Three months later, he returned to Britain to fetch his girl-friend, Diana Fulvers, who was planning to elope with him and marry him in Paris, although at that time, Rosten already had a wife. Ginger spotted Rosten's Jodel D11 making for the New Forest while on a routine patrol. He and Biggles then proceeded to the area and arrested Rosten, while putting Diana wise about Rosten's position. Rosten was subsequently sentenced to three years in prison, a lenient sentence as he decided to reveal the whereabouts of the stolen money.