Westminster Encampment -- Young People's Building

I've studied this photo for a long time, trying to place it on the old Westminster Encampment grounds.  Westminster was on what is now part of the Schreiner University campus, the part closest to town, between the old pavilion and the Union Church.  Looking at the rocks in the foreground, I'm wondering if this building was on the road just beside the little bridge.  What do you think?

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Young People's Building, Westminster Encampment, Kerrville, date unknown