Holy Ghost, Thou source of light. [Whitsuntide.] Appeared anonymously in the Andover Sabbath Hymn Book, 1858, No. 458, in 4 stanzas of 4 lines, and subsequently in several other collections. In the Baptist Praise Book, N. Y., 1871, it is altered to "Holy Spirit, Source of Light."
--John Julian, Dictionary of Hymnology (1907)