Well, I've been up most of the night wading through the links you so kindly listed. It's amazing how much information is out there!

I'm going to start the first on your list. It's very well written and interesting in its own right. And it will have exercises as I get on a bit. I suspect that you put that top purposely.....

All I can do now is to say how grateful I am for your intervention in my thread. If you ever get to Shropshire in England I'll buy you a drink. Or three.

Very best wishes to you and yours.