Thank you Les - I did Google a fair bit for Bayer's Uranometria. I am disappointed that it's not featured on
www.gutenberg.org though.
Dave
edit: I find it a bit cheeky that when you click on the link for the image, it says copyright to someone else. The Bayer Uranometria is public domain and is no longer copyrightable. I found this link, which has far better quality images imho:
http://aa.usno.navy.mil/library/rare/Bayer%201661.htm