From the back of the 1928 Billy Bunter Annual (which, I’m sure, was just the thing for Modern Wide-Awake boys who know What’s What, and who much prefer It neatly tucked away).
… Containing everything a boy wants to know about his favourite HOBBIES. Illustrated with HUNDREDS of attractive PICTURES. A special pocket inside the cover holds THREE UNIQUE SUPPLEMENTS.
I’m sure it does. Just see that you don’t overdo it at first, Chaps.