I ate lunch and headed back toward work.
I realized I didn't have my keys.
After checking at Quizno's, the little grocery, the front desk of the dorm, at the front desk in the Office of Research, and with the campus cops, I headed back toward my building with a heavy heart.
Then I realized I'd missed one place -- the little deli on the corner. And someone had, in fact, turned in my keys there.