What to do on a wet day?

Easy. Time to sort out the geocaches I’ll be searching for in Edinburgh; try to solve the puzzles ones before I get there. And print out the multi and Earth caches and see what information Mr Google can supply prior to my visit.
Yesterday I booked a free 2 hour walking tour and a free ghost walk of Edinburgh Do these guides make more than they would if they charged for the tours I wonder?  I always give at least a tenner because that’s what I’d pay over here.
So look out Edinburgh. I’ll be with you soon...