Today a hymnal toppled off my To-Do pile and flopped open to "I Sing the Mighty Power of God."

"Hmm," I said to myself, "you know, the tune of that could easily be made to sound like a sprightly Baroque piece." Then upon looking at the credits, I saw that the words are by Isaac Watts, but the tune is from Gesangbuch der Herzogl, 1784. Well, well, right place, right period for Baroque music.

I have only one question. What's a Herzogl? ( ein Gesang would be a song or choral piece.)