The Case of the Smeary Mirror - Little Lulu #142 (April, 1960)
John Stanley & Irving Tripp, 5 pages
As I've noted elsewhere, I was a latecomer to the genius of Little Lulu and company. This was the first 'Tubby as the Spider' story I ever read, and it still delights me to no end. I just love Tubby's wacky logic and his determination to pin everything on Lulu's Dad.