* a seat
* a seat post
* a wee tiny cable so that it now takes tools to remove the seat from the bike
* a new rear light
* a magic number to let me into the bike shelter
* relevant tools
* the post to the frame
* the seat to the post
* the cable to the frame
* the cable to the post
those last three simultaneously, which as it turns out does not require three hands but does require some clever leverage.
I still need to make final angle and height adjustments, after a bit of test-riding, but it's kind of hot out there just now. So I will probably leave that for this evening, and then head to the library tomorrow (they close early on Fridays; it was on my list for today, but I think all that running around collecting things with which to fix the bike makes a perfectly good substitute).
 Technically, this is a deposit rather than a purchase.