ST. THOMAS is actually lines 5 through 8 of the sixteen-line tune HOLBORN, composed by Aaron Williams (b. London, England, 1731; d. London, 1776) and published in his Collection (1763, 1765) as a setting for Charles Wesley's text "Soldiers of Christ, Arise" (570). The harmonization is by Lowell Mason (PHH 96). Well-suited to part singing, ST. THOMAS must remain stately, with two broad beats per bar.

Williams was a singing teacher, music engraver, and clerk at the Scottish Church, London Wall. He published various church music collections, some intended for rural church choirs. Representative of his compilations are The Universal Psalmodist (1763) – published in the United States as The American Harmony (1769) – The Royal Harmony (1766), The New Universal Psalmodist (1770), and Psalmody in Miniature (1778). His Harmonia Coelestis (1775) included anthems by noted composers.

--Psalter Hymnal Handbook