Update on the search for lyrics, described in detail below:
I have determined that William Mason, William Rowan, and Dudley Buck (coincidentally enough) all did sacred texts to “Largo.” There are texts called “Love Yet God,” “Love is of God,” “Trust in the Lord,” and “Hope in the Lord.” If you own a copy of any of these, I will be eternally grateful for a transcript. I will be calling music stores as soon as they open, but perhaps the magic of the internet… Well, no. Probably not. Still. Note how I say “music stores” as though there were more than one where I live. And as though they would have on hand a nice selection of hymns by obscure composers. Hmm… what if it were something like “Heavenly Father, no vegetable is more agreeable than thou…”?