If your play a piano in the woods, would the police come investigate it?

The answer is always a yes.

(CNN) -- Was it a theft? A prank? A roundabout effort to bring some holiday cheer to the police? Authorities in Harwich, Massachusetts, are probing the mysterious appearance of a piano, in good working condition, in the middle of the woods.

Discovered by a woman who was walking a trail, the Baldwin Acrosonic piano, model number 987, is intact -- and, apparently, in tune.

Mystery Piano in Forest Perplex Police.