Harp, awake! tell out the story. H. Downton. [New Year.] Appeared in Hymns for the London German Hospital, Dalston, 1848, No. 91; A. T. Russell's Psalms & Hymns, 1851, No. 64, in 4 stanzas of 8 lines; and again in the author's Hymns & Verses, 1873, p. 9. It is in several collections, including the Society for Promoting Christian Knowledge Church Hymns, 1871; the Westminster Abbey Hymn Book, 1883, and others. In Kennedy, 1863, No. 141, it begins with stanza i., line 5, "Sing we, brethren, faithful hearted." This in Dale's English Hymnal, 1874, is altered to "Join we, brethren, faithful hearted."
--John Julian, Dictionary of Hymnology (1907)