Is being a Freemason compatible with one's duty to God as a practising Christian? That is the question which the Rev. Walton Hannah, then a Church of England clergyman (but later a Catholic priest), set himself to answer with the publication of his Darkness Visible in 1952. Over 45 years later, this classic is now in its 17th impression, and is as popular as ever. Hannah wrote this book to prove his conviction that for a religious or quasi-religious organisation such as Freemasonry to offer prayers and worship to God from which the name of Jesus Christ has been deliberately excluded represents the abandonment of the Christian faith which many of its members nevertheless profess to uphold. No intelligent answer to his case has ever been made. Darkness Visible has been continuously in print since 1952. It includes the entire and authentic texts of the Masonic ritual of the first three degrees and of the Royal Arch. The accuracy of these has never been questioned, and was confirmed to a special Working Group of the Synod of the Church of England in 1987 by Commander Higham, Grand Secretary of the United Grand Lodge of England. In 1983 Stephen Knight's informative, wide-ranging and best-selling critique of Freemasonry, The Brotherhood, devoted a number of pages to Hannah's book which, he said, "alone deals conclusively with the matter of whether or not Masonry is a religion".