The history of indoor toilets (including those that flush) goes back further into history than you might expect. I share the timeline of such facilities, followed by surviving examples of Victorian indoor toilets, schematics of proper plumbing techniques of the day, and floor plans including indoor tubs and toilets. Victorians–at least late Victorians–had life pretty comfortable.
“In the late 19th century Gilded Age, wealthy individuals had finely appointed private cars custom-built to their specifications. Additionally many cars built by Pullman, Budd, and other companies that were originally used in common carrier service as passenger cars were later converted to business and private cars. There are various configurations, but the cars generally have an observation platform, a full kitchen, dining room, state room, an observation room, and often servant’s quarters.”