One of Jacobs' non-"Mad"-related projects was the 1965 "Alvin Steadfast on Vernacular Island", a gentle spoof of post-Victorian boys' books. The titular hero is a ten-year-old boy, who joins an adult explorer on Vernacular Island, a place populated by bizarre and wonderful creatures such as the Standing Ovation, the Ill Omen, the Glowing Report and the Ugly Rumor. The two humans go in search of the Doubt, and as their adventure takes them into the jungle, even more fabulous creatures are encountered. The original Dial Press edition was illustrated by Edward Gorey, in a non-characteristic whimsical style unlike his usual gleefully dark drawings. Jacobs' writing is only lightly cynical, with more of an emphasis on wordplay, puns and gentle humor.