Typically, the old farm (and grove) houses had a water tank that had a room at its base...used as a store room or bunkhouse.
There was no set rule as to its relative location to the main house. In this case, the tank may have been constructed such that it was in alignment with the sides of the house and was in-filled with additions.
California homes were very organic in that rooms were added or porches were enclosed to become needed bedrooms.
This portion of the structure would be a likely place to investigate. It may have been a bunkhouse, tool storage, work shop or the like.
Water wagons would have been sided for filling. A lot of activity would have been central to this structure.
The more one learns the more he understands his ignorance. I am simply an ignor ant man trying to lessen his ignorance
Well, whatever purpose that tower had, it's not where I'd focus my attention first. I'd look around the front door and the clothes line and the privy. But maybe I'm just weird.
Yep! You're just weird
California Grove and Ranch Houses are somewhat different than a typical farm property due to differing activity centers.
As stated, the water tower and bunkhouse / tool storage / work shop is central to all outside activities and, in my opinion, would be the primary focus, with the kiabo being second followed by the rear porch or / wash shed where bathing and clothes washing occurred (I'd look here before I'd look below the clothes line).
The area in front of the house where carriages and vehicles were parked and the wagon shed or barn where the vehicles were stored is another opportunity.
The more one learns the more he understands his ignorance. I am simply an ignor ant man trying to lessen his ignorance