One of the world's greatest cartoonists — and of course, I'm only saying that because he's my best friend in the male division — Sergio Aragonés will be appearing online in a live virtual event on Monday, April 28. It's for a good cause: The National Cartoonists Society, which among its other purposes in life, raises money to benefit cartoonists who could use a little help. You do not have to be an N.C.S. member to join in this online event. You just have to pay twelve bucks. More details can be found at this address.