Officers are still to identify the body they found near to the defunct Marazion railway station on August 15 at 8.50pm.
The victim is described as between 30 and 45 years old, 5ft 8in tall, of a thin to medium build, with grey hair and blue or green eyes.
He was wearing a black leather motorcycle jacket and black Belstaff motorcycle gloves.
He was also dressed in beige trousers, dark brown desert-style boots and, unusually for the time of year, he was wearing three tops underneath his jacket.
In his rucksack, police found a Duracell torch, a Casio LCD portable TV and radio, and a pair of sunglasses.
The bag also contained a plastic cheque-sized wallet which contained an old £1 note, an unwritten postcard of New York, a multi-tool and a small key.
The man also had a gold Bucherer watch with a black face and black leather strap.
A copy of the Motorcycle News magazine, dated August 12, was found nearby.
The station closed in the 1960s and only an abandoned station building surrounded by weeds and grass remains.
Anyone with information is asked to call 0800 405 040.
