Interesting. LoC says the album it came from was compiled in the 1860's (could have been added later I guess) and the CDV format could easily be 1860's.
Many of the more prestigious military schools had their own belt plate. The jacket does not look up to the normal West Point standards and in fact has a cheaper look to it. The trim is not as extensive, the collar looks not well fit to the cadet. There were many military school during this time period.
The two probably next-famous military institutes, the VMI and the Citadel, were both using a similar style. There of course were a few differences, e.g. the sleeve insignia for the Citadel. Another one would be the La Grange Military Institute (Alabama).
The same as the one on the right; what you're looking at is a removable waterproof kepi or forage cap cover made of either tarred canvas (like a haversack) or rubberized cloth (like a poncho or ground cloth).
The same as the one on the right; what you're looking at is a removable waterproof kepi or forage cap cover made of either tarred canvas (like a haversack) or rubberized cloth (like a poncho or ground cloth).