During the time Gus and his family lived in the house (1901-1910) there was only one bathroom shared by the entire family. It consisted of a tub, toilet and sink. If you look at the image above from Samuel Howe’s 1902 article in The Craftsman, A Visit to the House of Mr. Stickley you can see his illustration of the 2nd floor, including the bath.

Germ Theory had generally been accepted by the late 1800s and the importance of home sanitation along with it. Stickley espoused this importance and the value of appropriate devices in the construction of the home.

“No single feature of house building deserves more intelligent consideration than the subject of sanitary plumbing. It needs no argument to prove that health, purity and cleanliness should prevail throughout the house and especial care be given to the proper equipment of the bath room.”
The Craftsman (Feb 1906)