Ghostly Trace

There's a ghostly trace,
Which marks the place you mistook,
The window for sky.

Office bound all day. While deep in concentration a sickening thud startled me - it was a pigeon which had flown full pelt into the window, which must have been reflecting the sky (despite being in dire need of a clean). The poor thing didn't survive. It quite upset me for the rest of the day.

I felt I should honour his ghost, before it is washed away.