Here is the text of that letter:
Dear Mrs Thatcher: April 30
I've chosen a dark day to write a belated thank you for being so generous with your time on the occasion of your recent visit. The news has just arrived of Saigan's surrendor and somehow the shadow seems to have lengthened.
You were very kind and I am grateful. I hope you'll find it possible to accept your Calif. speaking invitations. If you can, Mrs. Reagan and I would like very much to return your hospitality. In the meantime, please know you have an enthusiastic supporter out here in the "colonies."
Again thanks and best regards.
Ronald Reagan
"colonies". Reagan humor once more.