1. It's written specifically to one Jacob Watson, whose signature appears on the back like a modern personal check. The written amount is $5500--, and below that is added "5000 discounted", which I take to mean the note was already (mostly?) cashed.

2. I used to follow someone online who worked as a scanner for IA and sometimes posted behind-the-scenes stuff including a few weird finds. (I can't name-drop since she hasn't worked with IA for a few years now, but maybe somebody else knows someone.) That might be the best bet since the process is largely automated and there's not a lot of time to document and compile incidentals like that.