Jeri, I am unable to download the score from tune from your link for some reason (my problem not the site's), and my soundcard isn't working, so I can't comment.

The version we sang in school is the original text from the Pilgrim's Progress, and the first line is, in Tonic Solfa :

d-,r m d| m.f s l -|s-s d |t d - -

Whether this is St Dunstan's I don't know, but it is definitely in 4/4

Murray