The forward-sloped windscreen wasn't unique to Miles, but more common in the USA. Off the top of my head, types I can recall thus equipped included the original C.W. (later GAL) Cygnet, some Ford and Stinson Tri-Motors, and the Vultee V-1, but I'm sure there were many others. Reduced distortion/reflection and speed gains were claimed. Calls to mind the reverse-slope rear windows on the Ford Anglia, Consul Classic and some Reliant three-wheelers. I got to Persan-Beaumont about a year later than you atb1943, and rather less grandly, hitching a lift from the nearest station in a Renault Dauphine whose driver was, shall we say, 'enthusiastic'. I remember the Maggie, seem to recall it being the mount of the aero club commandant. BTW, is your Biro a Miles-made one? I"ll bet Hairyplane has one of those!