One cover, shown in Figure 2, is addressed to Humpty Dumpty Esq. And as a final touch, the cachet on the envelope shows the king's horses and the king's men, presumably trying to put Humpty together again. King created his own catalog of Wonderland issues in the style of real stamp catalogs. He assigned each stamp a number, illustrated them and gave them fictitious catalog prices. The early issues are priced as used on cover as well as unused.
Mounted copies are worth a considerable premium.
Many of the early Wonderland issues are illustrated in King's book Alice Through the Pillar-box and What She Found There. Published in England in 1978, the book contains Carroll's original text illustrated with King's stamps and covers. Gerald King designed a few covers for British first-day cover dealer A.G. Bradbury. King used one of the covers for ordinary correspondence, using Machin definitives to pay postage. The cachet on the cover shows Alice at the Mad Hatter's Tea Party as well as some of King's Wonderland stamps.