FOUND by Dughall McCormick inside a milk crate
We had strange neighbours. We would hear them vacuuming or moving furniture in the middle of the night when the rest of the world would be asleep. They never really spoke to us either, tending to avoid eye-contact and would just grunt if any of us greeted them.
Outside our front door, we had a crate containing empty milk bottles. One evening, we heard their front door open then the unmistakeable clinking sound of milk bottles in our crate and then, moments later, their front door closing again. After ten minutes or so, I went to check in the crate and found this. There is no further information or explanation. We moved out a couple of weeks later.