Gill's no-holds-barred comments on stamp design and Russem's excellent synopsis of his work in the field are well worth a read; Gill felt that governments gave far too much weight to the "entirely sentimental views of philatelists and the general public," arguing that "Good lettering and figures and the simplest possible heraldic sign are sufficient for both beauty and nationality." As Russem notes, many of Gill's efforts at stamp design were not approved, and even those that were he often disliked in some way (of the George VI coronation stamp he wrote "Really the responsibility for the design is more the Post Office's than mine. I only drew the stuff as instructed").
A nicely-produced book on a fascinating aspect of typographical and philatelic history.