Thanks for that Jazzgirl ! I'll go with those and see where I end up ! I still don't see the disambiguation although there must surely be one in there somewhere, otherwise we'd end up with a situation which I saw years ago, where an Araucaria jigsaw could be filled in either of two ways (at 90 degrees to one another) and I missed the hint in one of the clues that a particular answer should be placed vertically. I don't submit the puzzle for the competition (the prizes aren't worth the price of the stamp) so it's only a bit of fun and mental exercise.