It occurs to me that I haven’t yet seen anyone come forward with other memos written by Killian who’s provenance can be firmly established – say something in the posession of his family or still in military records – that was also typed in the manner of these memos. If you could find something (preferably a lot of somethings) that looks the same bearing his signature, that would indicate something. Likewise, if none of them use this typeface, that would also indicate something. Or are these the only memos the fellow ever wrote…?