My late father knew Herbert Smith whilst Mr Smith was living in Skipton in the last years of his life.
My father had many conversations with Mr Smith and his wife.
Mrs Smith was bitter because the British 'establishment' never acknowledged his work with Sopwith due to his 'defection' to the Mitsubishi in Japan during the inter-war years.
The British resented the work he did developing the Japanese aircraft industry and unfortunately, as Fournierf5 points out, this work did assist the Japanese in producing the aircraft used during the Pearl Harbor raid.
At one point my father had Mr Smith sign a copy of a 'Profile Publication' of the Sopwith Camel - but over time I have lost track of this interesting document.
KR
FOK