Getting back to the shoes

As I was putting more shoes in my new cubby holes (see previous post) I came across an obstacle. I couldn't get a pair of shoes in one of the cubbies. I stuck my hand deep into the hole and aha! I found a shoe that the previous owner left behind. It was a designer pump, but only one. If it had been a pair and in my size, I may have kept them. Does that make me a bad person?