I tried to contact him for permission to use one or more of his visuals but my request was transfered to the ADAGP here in France, who agreed if I paid 7€ plus tax a month! This is the reason why I always ask beforehand, so as not to get into any copyright trouble!!! So my advice would be, always ask for written permission before posting anyone's work on a blog, and type "Wayne Thiebaud" on google image to see some of his work. There's plenty to see. Truly inspiring!