I’ve just noticed a curious thing for the first time . . .
The Anniversary edition of Graded Readings in Gregg Shorthand was published in 1930. The US edition has shorthand plates written by Louis Leslie. The British edition has plates written by W.C. Blackwell.
Also, the contents are different. In the British edition, content specific to US history and culture has been removed (such as “The American Red Cross”, “Copper and Paul Revere”, and a number of other articles.)
Here are scans of the contents and first text page of the two editions, both dated 1930.
Lee