The idea of a mail box is intriguing but having been there (well not "been" there), I know it is indeed a paper towel holder. This is pretty fancy alright. Toilet seat and a real toilet roll, not a Sears catalogue, paper towel dispenser above a bench that has a cutout for a water basin (a seasonal thing not in this picture due to the inevitability of becoming a rather useless ice basin). I guess it is true that "cleanliness is next to Godliness".
A more detailed view of the amenities. It is seriously still in use. Submitted as Exhibit A - one toilet roll.
Last occupant had to be a guy - seat up