You are all right, but if you cross that line before and get that warning, it will not pop-up agian unless you logout and in agian. Too bad you died, try to cut some magic and sell.
You might just want to try this page for treasure trails, use CTRL + F and search for what you need. Edit: use the coordinate tracker, it can be found here
Yeah, i got one of thoose aswell, simply get all the items needed, and food for the saradomin wizard (i know its a c00rd! \ ), then go 0wn the nablet. Edit: Dont worry, its only the first part you need todo, so its easy.
I got a clue scroll Level 3, and it says "00 Degrees 00 Minutes North, 07 Degrees 13 minutes West" now i wonder, how in the hell am i supposed to get in there?