Son of God, Eternal Word. Bishop C. Wordsworth of Lincoln. [Morning.] This, together with Bishop Wordsworth's Evening Hymn, "the day is gently sinking to a close," were printed separately from his Holy Year, and were pasted into unsold copies of the 3rd edition of that work, in 1863. In 1864 they were given as the opening hymns of the Holy Year, and have since come into somewhat general use in Great Britain and America.
-- John Julian, Dictionary of Hymnology (1907)