赤柱監獄
To help the British civilians in the Stanley Internment Camp, Grayburn assisted in raising money for them so they could buy extra rations from official canteens and the black market. Grayburn asked Dr. Harry Talbot to smuggle cash back into the camp when he was sent out from Stanley for treatment at the French Hospital but was caught by the Kempeitai. Grayburn and his assistant Edward Streatfield went to the Foreign Affairs Office and confessed he was responsible for the smuggling and money-raising operations. Grayburn and Streatfield were arrested two weeks later on 17 April 1943 and taken to the Happy Valley Gendarmerie. Grayburn was sentenced to one hundred days or three months in the Stanley Prison.