If you will notice, I did not refer to proportional spacing as evidence of the spuriousness of the documents. It was the superscripting that I think is virtually conclusive.
Not conclusive and not even an issue. The th was simply a special character in the Times Roman type ball. This has been demonstrated over and over this afternoon. You are going to make FR look like a bunch of fools.
I am looking for "replacement" type-bars for the IBM Executive model typewriters. At least one poster here has expressed a clear recollection of a "superscript st" being on the keyboard. The typewriter is designed to take replacement characters to suit the office it is being used in, but I haven't seen a catalog of optional parts.