http://www.hadley.org.uk/family-tree/william-williams.htm Biographical note, portrait, Welsh lyrics and English translation of "Guide Me, O Thou Great Jehovah." http://www.christian-bookshop.co.uk/free/biogs/pcelyn1.htm Extended biographical article. http://fly.hiwaay.net/~bsrich/will&welshcalmeth.htm (from a book by Marten Lloyd-Jones) "Williams is considered perhaps the greatest Welsh poet."