Surprises Along The Way

I found a few things while walking Monday. First, on my morning walk to Union Station on E St NE I found a completely unused sheet of stickers - dump trucks, back hoes, cement mixers. I looked around to make sure there were no crying toddlers nearby and snatched up the sheet. It proved to be excellent motivation for getting a bunch of 30-somethings to happy hour on a Monday night. Who knew?

Then, on my walk from work to Chadwicks I found some art, at the corner of 41st and Garrison NW: a lamminated index card ziptied to an old metal post and a new wrench sitting on the box.  Anyone know of a street artist working with the theme "ps I love you"? There was nothing on the back of the card and my searches on the tubes were fruitless. And what were those metal box posts used for originally?