Well House? Watch Tower?

Another photo from Lillie Newman Barnes' "John Gruel Farm" envelope, and this time I believe it may actually be the farm. The photo is undated, but a partially visible car at left, behind the fence, looks 1920s-ish to me.


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Image courtesy of Diane Barnes.

I think (though I'm not sure) that the barn in the background at right is still standing.

But let us look at that tall, thin, gabled structure in the foreground. What the heck is it? My guess is a well house, perhaps with a water tank in the upper part, which would create water pressure via gravity.

It's interesting to compare the above photo with one from the Chicago Daily Tribune "fortress" article. One of the aerial photos in that article identifies a tall, thin structure near the entrance to the farm as a "watch tower."


(Click on image to enlarge)
From the Chicago Daily Tribune, date unknown.

This photo isn't clear enough to see the details of the "watch tower" for comparison, but notice its location with respect to the other outbuildings, especially the barn towards the right edge of the picture. Whatever purpose it served, I think we may be looking at the same structure in both pictures.