Thanks Dobbs, that's an elegant way of determining sightings, I could maybe do it in real time, to give the right feel for it.

You refer to a list of encounters, do you have one drawn up already? I know I could work one out fairly easily I'm just being lazy, that and putting all my spare mental energy into making some cliff scenery and I don't seem to have much mental energy at all.

Thanks for the cards, they are much appreciated.