“Old Maud” on Youtube by Dan and Jenny Trio:
Island Lake Historical Society
Lake Zurich Historical Society
Kisselburg Wauconda Obituaries
Illinois State Historical Society
American Association for State and Local History
The Encyclopedia of Chicago has an article on the village of Wauconda, with a good summary of the town’s development and history (though I think its somewhat dismissive conclusion that the town is now a “suburban residential area” is Chicago-centric and inaccurate).