[Laurent Rizzotti]

The probable explanation was that he was brought back by a transport aircraft to Istres (many transport units were based here). Istres was used to ferry by air paratroops to Sicily, even if I am not aware that such flights took place in August 1943 (main moves were in the second decade of July just after the Allied landings in Sicily). But it is probable such flights continued to Italian air bases.

One possibility was that he was captured by German paratroops in Sicily and sent to a paratroops HQ that was still in Istres ?