Time Travel and Subconscious Errands

I have pretty much decided not to go to New York later this month, even though the hotel rates and airfares were tantalizingly low. Some research revealed that some of the things I hoped to see as part of my research don't actually exist in a useful form, and some of the things that might have been useful are currently closed for renovations. There might have been enough useful things to sort of justify a tax writeoff, but it would have been mostly a fun trip, and this isn't really the time o...