Here’s a signed publicity photo of Joan Rivers. The message appears to be: “To Tomie and Doug - What a joy and a pleasure that some friendships last longer than youth - (or in my case youthess) xxxxx Joan Rivers”
(It looks to me as if she wrote “youthess.” Plural of youth?)
I assume this was written in the early 1970s while Tomie and Doug were in Las Vegas living for a short period while waiting for Doug’s divorce to be finalized.
A story that I might not correctly remember: Joan Rivers invited Tomie and his mother to attend her first appearance on “The Tonight Show” with Johnny Carson. She wanted Tomie and Flossie’s enthusiastic laughter in the audience. I believe that first appearance was in 1965. (Bob)