The Manxman was a minelayer and had a reputation for being the fastest ship in the Royal Navy. The Manxman was deployed to the British Pacific Fleet and was in Melbourne, Australia, on 15 August 1945 when Emperor Hirohito announced Japan's surrender. According to Robert Dean's records, the Manxman arrived in Yokohama on September 17 1945, as part of a mission to transport personnel and supplies within the area. HMS Manxman traveled to Japan several times. It was during a shore visit, while walking through the rubble of Nagasaki, that Robert noticed a perfect piece of stone laying on the ground. It appealed to him as it was clean and intact unlike the surrounding destruction that he witnessed in most of the city. The stone was engraved with an image of a cross and a Japanese written inscription. He placed it in his pocket and the stone, which was made of marble, became a personal treasure.