Thanks Rory,
I didn’t realise it was that old. No wonder he writes about the 1938 jockey table e.g.:-
Gordon Richards: rides 974; wins 206; 2nd 138; 3rd 135. %21.14
W. Nevett %17.5
Eph Smith %13.71
Harry Wragg %12.63
R. Perryman %17.97
Also, he writes:
Make a note of all the placed two year olds in the Coventry, Chesham and New Stakes at Ascot and follow them for the rest of the season, backing them each way, level stakes. In the ten years from 1928 this has shown a profit of 108.75 points.