For a starter.

The tune in question is SHIPSTON, which is arranged by Vaughan Williams from a "traditional English melody." The texts for this tune in The English Hymnal (1906, 1933) are "No. 390: Firmly I believe and truly" and "No. 599: Jesu, tender Shepherd, hear me." Hear the midi tune at The Cyber Hymnal. In BBC Songs of Praise [Music edition] (1997, no. 398), this tune is set to the words "God, whose farm is all creation", with a comment: "collected by Lucy Broadwood (1858-1929) / harm. R. Vaughan Williams (1872-1958)."