He buried it at midnight
The puzzle
A man dug a hole, put something in it and covered it over.
He did it in the middle of the night so that nobody would see.
See the answer (spoiler)
Spoilers from here on. If you want to work it out yourself, leave this folded and move on.
Answer
He was planting bulbs in the garden — tulips, and a few hyacinths.
It was meant to be a surprise for his wife, so he did it after dark and waited for the spring.
