Behold the Saviour of mankind. Samuel Wesley, sen. [Good Friday.] Written previous to the fire at his Rectory of Epworth, which was burnt down in 1709. At this fire John Wesley was saved from death by being rescued through the bedroom window by some of the parishioners. During the fire the manuscript of this hymn was blown into the Rectory garden, where it was subsequently found. It was first published in J. Wesley's Psalms & Hymns, Charlestown, South Carolina, 1736-7, p. 46; also in the Wesley Hymns and Sacred Poems, 1739, in 4 stanzas of 4 lines; and again in the Wesleyan Hymn Book in 1780, revised edition, 1875, No. 22. From that collection it has passed into various hymnals both in Great Britain and America. The original contains 6 stanzas of 4 lines. Stanzas ii. and v. are usually omitted.
-- John Julian, Dictionary of Hymnology (1907)