Now daily shines the sun more fair. By E. Caswall, in his Lyra Catholica, 1849, pp. 207-8, and Hymns & Poems, 1873, pp. 109-110. In 1863 it was given with alterations in the Wellington College Hymn Book and appointed for St. Mark's Day morning. [A translation of Aurora Lucis Rutilat, attributed to St. Ambrose.]
-- John Julian, Dictionary of Hymnology (1907)