Deep Navigation Colliery Deep Navigation Colliery Deep Navigation Colliery was a coal mine in South Wales, that operated from 1872 until 1991. Located next to the co-developed village of Treharris in the borough of Merthyr Tydfil, on development it was the deepest coalmine in South Wales Coalfield by some . Producing the highest quality steam coal, it powered both the Cunard passenger steamers RMS "Mauretania" and RMS "Lusitania" in their successful attempts at the Blue Riband prize for the most rapid Atlantic Ocean passage. The mine is also thought to have been one of several locally that provided coal to the RMS Titanic;
O the Deep, Deep Love of Jesus O the Deep, Deep Love of Jesus "O the Deep Deep, Love of Jesus" is a well-known Christian hymn, written by the London merchant Samuel Trevor Francis. Francis (1834–1925) had a spiritual turning point as a teenager, contemplating suicide one night on a bridge over the River Thames. Experiencing a renewal of faith, he went on to author many poems and hymns and was a preacher in addition to his merchant career. The song compares Jesus' love to the ocean in scope, emphasizing the limitless, unchanging, and sacrificial nature of God's affections for the singer and all of humanity. It