When the Lord of Hosts ascended. Bishop C. Wordsworth. [Whitsunday.] First published in his Holy Year, 1863, it was given in two parts, Pt. ii. being "Not in fire from heaven descending," the text throughout being revised by the author. Three centos therefrom are in common use: (1) Opening with stanza i.; (2) "Guide of sinners, go before us;" (3) "Holy Ghost, Divine Creator."
--John Julian, Dictionary of Hymnology (1907)