I would like to thank to those who offered to help me.
Special thanks to Melissa for your hard work and kindness.
Special thanks to John, for your hard work, good advice and kind words.
I would like to thank very much to Dr. Tony Brown of R.S.Thomas Centre for his kind offer and much help.
I really appreciate Mr. Martin Connolly's much help and good advices.
Special thanks, too, to the Welsh, and the English who now live in Wales, for your much help in my travels. Without their support and kind offers I could not have visited the places concerning about R.S.. If they had not helped me, I, this strange traveller from Japan, would not have visted Wales again and again.
I would like to also thank to the professor-emiritus, Takemasa Tatsuno.