Cartoonist Richard Thompson has announced that he is ending his celebrated comic strip, Cul de Sac. A few years ago, Thompson announced that he had been diagnosed with Parkinson’s Disease. The young-onset variety, like Michael J. Fox has. A couple of months ago, Thompson’s friend and ally Chris Sparks raised money for the Fox Foundation with Team Cul de Sac: Cartoonists Draw the Line at Parkinson’s. I’m so glad that Thompson was able to delay his announcement until after the release of the book. In the heyday of newsprint Cul de Sac would have appeared in 1000 papers. It’s been one of the reasons why I’ve kept home delivery of The Boston Globe, and I will miss it.