That's not the best picture in the land! Google thinks he's invisible with over 300,000 hits but no sign of any pix. He was not exactly low profile, one site even alleging his work with Mitsubishi in the 20s started the Japanese on the road to Pearl Harbor (a bit over the top!). In later years he visited the Northern Aeroplane Workshop and the RAeS honoured him just before his death. Surely a decent image is out there somewhere!