Carol, thank you for posting the above, very interesting information. On another note; As a guest I have never understood the rule regarding guest postings. It seems like a for of censorship that disallows a wide range of debate and discussion. Last week I wished to start a thread on bookshops in New York as I am going there on holiday. I realized that , as guest, I could not pose this innocent question. This seems, to me at least, to guarantee that only a small group may determine what subjects are acceptable. There may be very good reasons why one may not wish to be a member, so signing up is not always an option. Just my thoughts on the subject.