My husband's great grandfather, William Albert Downey, owned a cabinet shop/furniture shop in Decatur, Illinois. He had been a carpenter most of his life. We have a photo of him in his shop.
We also have a blank receipt from his business. It shows the address as 2177 North Church St., Decatur, Illinois.
But even more imporant than these items is the piece of furniture we have that was made by William Albert Downey. It's a wash stand. It actually has a mirror to go with it, but when we inherited it the mirror was in really bad shape and was being refinished. Unfortunately it's still in the same condition :-)