Delight/Delirium and Merv (Score 2, Interesting)

Hi Neil, Just a quick two part question for you. Two of my favorite characters in "The Sandman" are Delight and Merv Pumpkinhead. My question is this, will you ever write a story or let us know how Delight became Delirium and how did you ever come up with Merv? I read Hy Bender's Companion book and didn't see either question really answered. Thanks for your time and for all you have written. Shannon