Dwig was W.A. Dwiggins’ nickname — one of a few, including WAD and Bill as well as his nom de crayon, Hermann Püterschein. Below are “Don’t” cards by Dwig. But don’t be confused, they are not by W.A. Dwiggins, but rather by Clare Victor Dwiggins, who I wrote about here.
These novelties were part of Dwig’s large number of novelty books and cards. Rather than Do This or Do That, these Don’t cards posit the opposite in lettering that posits the contrary.