Spirit of God, that moved of old. Cecil F. Alexander, née Humphreys. [Whitsuntide.] Appeared in the Society for Promoting Christian KnowledgeHymns, 1852, No. 70, in 4 stanzas of 4 lines. In Mrs. Alexander's Hymns Descriptive and Devotional, 1858, No. 15, it was republished in 5 stanzas of 4 lines, the new stanza, the third, being "Unseal the well within our hearts." The 1852 text is that usually given in modern hymnbooks. In Dr. Martineau's Hymns, &c, 1873. No. 95 is an altered form of stanzas ii.-iv. of the 1852 text, and begins, "Thou Power and Peace! in Whom we find."
-- John Julian, Dictionary of Hymnology (1907)