1. It would appear that a lot of the swag* has been dissolved by all of those years of STL coal smoke. Oddly, its sibling on the left seems largely unaffected?

    * = new word for me!

      • I think that’s sandstone, and not the hardier and denser limestone.

    • I expect the slope and curve at the end has offered greater exposure to the action of the rain, while the other little vignette lies on a flat vertical surface.

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