A letter is a tolerable substitute for a visit. If I can’t visit, I write. I have an old Royal typewriter to help me. I roll in a bit of paper, type with two fingers, sometimes 30 words a minute. If you look up the word “visit,” you’ll find there’s some heft to it: To visit is to go and see about someone, to go and comfort or help. A visit is no small matter. Neither is a letter. You can type or handwrite, just don’t worry what to write. Start with the word “Dear” and the words will come.