Franklin Gimson sees Florence Eileen Hyde in the evening and finds that she's taking the death of her husband 'very philosophically':
She feels however, that it was lack of foresight on the part of others that was responsible for the Japanese discovering what he was doing. Actually what he was doing I refrained from enquiring just as she refrained from giving information.
Charles Hyde had in fact been engaged in a wide variety of relief and resistance activities before his arrest in April 1943. What cost him his life was indeed the lack of 'foresight' of another British Army Aid Group agent who inadvertenly gave the Japanese information which led to his arrest for his role in a plot to help an Indian prisoner of war escape.
Source:
Franklin Gimson, Diary, Weston Library, Oxford, p. 40 (recto)