Here's Craig's description:
"From 1952 this was a guide for gag cartoonists and their writers. It’s set up four months in advance so it gives ideas to creators who can work on and submit ideas that will be printed down.. The calendar is illustrated by Jack Markow whose work I like a lot. I’ve included a little auto-bio thing he did in another publication put out by Cartoon Consultants. This is all fun to look at, but seeing it might actually have some practical use for the gag cartoonists out there still slugging it out. So, I will post a new page on the first day of each month for the rest of 2008."
In case you missed them:
Cartoonist Consultants Calendar for January
Cartoonist Consultants Calendar for February
Cartoonist Consultants Calendar for March