Dick Weekes on FB: The bike shown under the Sheldon article (Anker??) is actually a James model K of about 1938 with the Villiers 9D engine/gearbox unit. Minus the cast ali silencer it became the wartime Clockwork Mouse bike.
Ed. My guess is that it's actually a rebadged James. The Baker decal is very clear on the tank, and it is known that James took over Baker and used their components. The date of 1938 applies to the photograph - the bike could be earlier as the Villiers 9D was in use on this model from @ 1936