O brothers, lift [tune] your voices. Bishop E. H. Bickersteth. [Missions.] Written for the Jubilee of the Church Missionary Society, 1848, and first printed in the Jubilee Tract of that year. It was given in the author's Poems, 1849; his Psalms & Hymns, 1858; and his Hymnal Companion, 1870 and 1876. In Kennedy, 1863, it reads, "O brothers, tune your voices," but the hymn is not improved by the change.
--John Julian, Dictionary of Hymnology (1907)