|Fresco by Giotto di Bondone - Courtesy of Wikipedia|
Sower and Seed of Man's Reprieving is by Monsignor Ronald A. Knox (1888 - 1957). In the Divine Office (1974) it is sung at Morning Prayer on the Solemnity of the Ascension of the Lord. The Office recommends the hymn tune: Les Commandements de Dieu by Louis Bourgeois (c.1510–1560) as it's musical setting. An alternative tune that can all be used is St. Clement, as featured in the following video.
Alternative Tune: St. Clement