An entry for bathing looks like a curiosity until the shape of the tradition it comes from is clear. Astrology as practised in the medieval Islamic world and in Latin Europe was not principally a way of describing character. It was a decision technology, and its largest working branches were horary, which answers a question from the moment it is asked, and electional, which chooses a moment for an act.
Once a system claims that some moments are better than others for beginning a thing, it owes an answer for every thing anyone might begin. That is why the electional literature reads like a household manual: sowing, building, marrying, buying, travelling, taking medicine, washing. The mundane items are not decoration. They are the system being consistent with itself.
There is a second reason washing in particular recurs. It sits on the boundary between hygiene and purification, and in most of the traditions this atlas covers that boundary is not drawn where a modern reader would draw it. Ritual bathing before prayer, before an initiation or before a working is widespread, and an astrological election for the moment of washing belongs to the same order of thinking as a ritual prescription for the water's source or its temperature.
The atlas records the astrological material under this entry and treats the ritual material under the traditions that hold it, because the two overlap without being the same thing.