Everyone knows everyone
This is a total coincidence. Someone with the same name as "E's cousin D" in my 1969 diary happened to post on the NY Times crossword forum. The name is common, so I E-mailed and asked and sure enough, it's the same person. I directed him over here to read about those halcyon days.
While I was at it, I also told E about the diary. And the male J. I guess it's a little weird to be in someone's public diary, but I haven't said anything embarrassing about anyone. Not that there was really anything embarrassing to tell.