How many windows?

Bit of a mix-up on this morning's job - told to turn up for 11:20 at the City Chambers but by the time I got there about 11:10, everyone had gone. And that from a police press release. Ah well. Took the opportunity to take a few pictures on my way home - a couple more of the Phototrail markers and a few close entrances on the Royal Mile, but in the end went with this few from the Castle Esplanade. There are so many windows visible in this picture! Wondered what it would be like as a jigsaw. Would have to be a big one - more than a thousand pieces probably - and it isn't really that exciting, but might be a good challenge. Wonder what the self-publishing opportunities are for jigsaws - physical or virtual? Probably get a better idea of it if you view larger...