Are PMs turned off? I can't seem to find them so I can't send you a pic of the wall.
Oh, I also seem to be an advanced user now...?
Okay...here's a link to it.
http://www.pi.pwp.blueyonder.co.uk/n...f/cozumel1.jpg
And you're on the right track - some symbols ARE the same...what you've gotta do is group them together in order to "snake" your way across the wall. That will reveal the coordinates for Isla Culebra. Let me know if you want to see the version with the solution and I'll email it to you.