On September 20, 1973, a Beech Model 18 aircraft carrying singer Jim Croce and his entourage crashed shortly after takeoff from Natchitoches, Louisiana. All were killed.

At the time of the crash, the plane was being flown by Robert N. Elliott, an employee of Roberts Airways. Roberts had been asked by Mustang Aviation to fly the entourage according to a prepared itinerary. Mustang originally had entered into a con- tract with Lloyd St. Martin of Variety Artists International, a booking agent for popular

singers, to fly the group itself. The agreement was entered into on September 18, 1973. Later that same day, Mustang learned that its aircraft was disabled, so Mustang's director of operations called Roberts and asked it to substitute.

Relatives of Mr. Croce and the others killed in the crash brought suit against Mustang for the crash. What, if any, agency relationships existed in this case? How did they arise? Is Mustang liable for the crash? [Croce v Bromley Corp., 623 F.2d 1084 (5th Cir. 1980)]