Ashley Chapman was one of the few people ever to flee in danger from an invader in Australian territory. He was an oil depot manager on the north coast of New Guinea when the Japanese military arrived. A six-week arduous cross-country trek got his party safely to Port Moresby, then Sydney. He joined the RAAF and a posting back to Papua New Guinea with Allied Intelligence followed. He now lives in retirement on the New South Wales Central Coast, where Robert Murray interviewed him in July. * * * Robert Murray: You arrived in New Guinea in 1933 to work…