Ok, here's a recipe from my Alfred Andresen baking booklet circa 1905
2 cups flour
2 cups milk
1/2 cup melted butter
2 teaspoons sugar
2 teaspoons baking powder
1 teaspoon salt
2 eggs, with whites and yokes beaten seperately.
So there ya have it, a bonofide waffle recipe from the same period as most of your cast iron waffle irons.
Here's some pics of my most recently acquired waffle iron (Alfred Andresen)