They're displaying side by side for me. Either way, I think they were taken at a slightly different position and a small space of time apart.
If you put the one wit the caption on one line on the left they may give a nice 3-D effect seen through a stereo card viewer. The big outfits used special setups, but I can see a local photographer using two cameras a few feet apart and moving from one to the other.
Steve B
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