Leif Peng, an Ontario illustrator, continues to dispense information and images about illustrators of the 1940s and 50s at his Today's Inspiration blog.
Some great stuff here. I love those old ads, especially the one of Santa smoking. "... Smoke PALL MALL the cigarettes whose mildness you can measure," testifies Santa. This is a thoughtful site and I always learn something when I go there. This is obviously a labor of love.
Leif has his own illustration site here.