I kept hearing sounds as if someone was shuffling behind me and three times I stopped and turned around. But there was no one there.
Then I realized it was the keys nudging against each other, lightly, wood on wood.
Later in the day I returned to the piano and others were now there. I could not make the keys do it again.
Perhaps the proximity to the sea overnight had made the wood expand a bit and then the sun shrunk it again. Whatever the reason, to me it was a gift.
* Part of the Oak Bay Summer Public Art Project.