Joe

You might be right. Its just that phrases like
"and for me to enforce you my ruin might be"
"She's the source of my comfort and my only joy"
read awkwardly to me in the context of the song. Mind you, to describe them as "literary" was stretching a point! Must have been late.

I was't suggesting Henry had done it - though he often plugged gaps in songs, as far as I know. You're right about the tonic sol-fa, incidentally.
regards
p.s. I think there is some more material from the Henry archive due out over the next year or so.