Come, blessed Spirit, Source of light. B. Beddome. [Holy Spirit.] This hymn is given in his Sermons, 1816, vol. iv., and in his (posthumous) Hymns, 1817, No. 136, in 4 stanzas of 4 lines, and in each instance it is undated. It is found in extensive use in American hymn-books in two forms; first the original, as in Dr. Hatfield's Church Hymn Book, 1872 (where it is dated 1770); and 2nd changed from L.M. to S.M. in the Methodist Episcopal Hymns, 1849, “Come, Spirit, source of light." [William T. Brooke]
--John Julian, Dictionary of Hymnology (1907)