For the past several weeks I've been hearing someone practice piano in the evenings in an apartment adjacent to my hotel and just outside my window. The music varies from night to night and sometimes from minute to minute. My favorite song and the song most frequently practiced is one that is hauntingly beautiful. It's slow, dreamy, nostalgic and a little sad. Like a tenderly remembered, cherished memory of a love gone by. I wish I knew what it was.