Help with civil war era rifle

[aviator41]

Here's some data on Whitneyville Armory rifles. Should be able to get lots of great info here. I believe caliber should be stamped on the barrel somewhere, thought I'm not sure where.

Edit: Caliber should be on the barrel, directly on top and just in front of the receiver.

http://milpas.cc/rifles/ZFiles/Sporting Rifles/Whitney Arms/Gallery/Whitney Arms Company.html

Edit 2: it appears this is a Whitneyville Armory Style II Rolling Block. The website above shows one in .52 center-fire, which I would guess is what you have. IT's close to the 50-70 Gov't Sharps ammo. This is that rifles competitor.

Note this photo with the exact patent information on on it:

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