Mr. Kelly,
Yes, you're clearly correct in saying our anonymous Harriet isn't Harriet
Lane Levy (alias Hattie). We'll have to see if Mark Twain's autograph note
is still with her papers downstairs! Anyway, thanks for the lead. We hadn't
found this letter ourselves, but as Barb says, there are clearly hundreds
if not thousands of such hidden letters out there. We can use all the help
we can get!
Bob