Still puzzling over No.19 "Two native American peoples, some great and sparkling water, and a ranking Officer" (3 5 5)
Any clues please much appreciated
The Great Lakes seems possible. Huron and Erie for the first bit, and I've heard of sparkling water in relation to Michigan's drinking water. That leaves Superior that could be either great or ranking officer and Ontario that doesn't seem to match anything.
Thanks everybody for that - sounds as if that might well be the answer, better than anything I've thought of anyway. Almost there now with this quiz, still a month to go.