Though holy, holy, holy, Lord. J. Montgomery. [Holy Trinity.] This appeared in Bickersteth's Christian Psalmody, 1833, No. 12, in 7 stanzas of 4 lines, and based on Isaiah vi. 3. It is given in a few modem hymnbooks in Great Britain and America, but is not found in Montgomery's Original Hymns, 1853.
--John Julian, Dictionary of Hymnology (1907)