By now, many of you know that Bill Watterson came out of retirement briefly, a week ago, as a secret contributor of artwork to Pearls Before Swine on June 4th, 5th, and 6th. It was a collaboration that Bill proposed to Pearls Before Swine cartoonist Stephan Pastis, in order to raise money to help fight Parkinson’s disease, and in honor of Richard Thompson, the cartoonist behind Cul de Sac who has been forced to stop drawing that strip due to Parkinson’s.It is a testimony to Bill Watterson’s compassion for other people that he was willing to do this, in spite of his strong desire to live in isolation following the remarkable popularity of Calvin and Hobbes. As Bill said in a 2013 interview, “Calvin and Hobbes created a level of attention and expectation that I don’t know how to process.”Bill Watterson previously created artwork to support Parkinson’s research and Richard Thompson, in the form of a painting of Petey from Cul de Sac. Click here: Article on Bill Waterson’s Painting of PeteyStephan Pastis wrote about the experience of collaborating with Bill Watterson to produce the three strips:Click here: Stephan Pastis’s June 7th BlogAnd Bill Watterson commented on the experience in a Washington Post article:Click here: Bill Watterson, Washington PostAfter the collaboration was over, Stephan Pastis finally got to meet Bill Watterson in person when they went to visit Richard Thompson. Here is an excerpt from a CNN article:“After their long-distance collaboration — which was done entirely through e-mail, without so much as even one phone call — Pastis finally got to meet his hero last week in Washington when they went to visit Thompson. The pair spent hours talking about Charles Schulz — a mutual influence — the challenges of the comic strip business, and simply the wonders of humor. Watterson is ‘quick to laugh,’ says Pastis. ‘When you make him laugh, he really laughs.’ "Here is what Richard Thompson says about Bill Watterson:“Calvin and Hobbes is still the benchmark of the last 30 years when it comes to instantly classic strips. It’s hard to touch upon the subjects he did without infringing on the territory.”And here is what Bill Watterson said about Richard Thompson:“Richard Thompson’s Cul de Sac has it all – intelligence, gentle humor, a delightful way with words, and, most surprising of all, wonderful, wonderful drawings….. The artwork in Cul de Sac bowls me over. It is a pleasure to study long after the strips are read.”This is an incredible compliment coming from Bill Watterson, himself a creator of incredible artwork.