Apropos of nothing in particular, you can free-download a PDF of the booklet to the Aled Jones CD which contains this song (it contains colour photos so takes a minute to load):
I wuz flying around the googleverse looking for an Allee among the Alleys, and found this instead. (Well, it beats working...) It would be interesting to check the first printed source of Somervell's words. The internet doesn't so much hide a multitude of sins as multiply them exponentially. Anything in C# libe?