I have known Virgil and his family all my life, and feel, instead of asking Mr Skellie to post, to ask Virgil directly, as he stated above that he had the information. You will get more from him, and if he sees the above post, he will probably take it as you are trying to go behind his back to get the information. You may not see it that way, but I believe he will.
With that said, he may be hard to get ahold of as his father has been in ICU for a few weeks.
I was with him when he got a diary and letters several years ago, though I have no clue if it the ones mentioned, as he has several originals. The ones I was with, he paid a great deal for, but said he was glad to get them back in the family.
Again, the best approach to the Roberts family is directly.
Sincerely,
Tim