1. Type up to the point where the "st" or "nd" or "rd" or "th" appeared after a typed number. Roll the platen up half way. (Normally that would be 6 points, but these documents are 13 pitch, which was not available on any machine in the 70s.)
2. Remove the type ball and insert another one with a smaller type face on it. Type the "st" or whatever follows the number in question. Then roll the platen back to normal.
3. Continue with the typing until the next number with following letters, crops up. Repeat steps 1 - 3 until the document is finished.
All this assumes that Lt. Col. Killiam could type his own memos in addition to having access to such a specialized machine and the extra typing ball. Killian's widow, and his son who followed him in the Guard and retired as Captain, asset that Killian did not type. The standard practice is that the typist puts his/her initials at the end of the document -- to identify who made the mistakes, if mistakes were made.
Here's the format for that in civilian life: JCA/kh The first initials are the person who wrote the letter, the second are the typist. IIRD, the military standard then was to reverse the order and use a colon: kh:JCA Since no initials appear, either Killian typed these himself, or the typist used did not follow the rules, or these documents are forgeries. There are no other options.
Congressman Billybob / John C. Armor
Very much appreciate the explanation. I'm sure others will also. Best Regards, BJN