Manufacture Mark on General McClellan's Copy of Special Order 191
The Platner & Porter Manufacturing Co. embossed its paper stock with the image of the Capitol, the word CONGRESS underneath and Platner & Porter in an arc over it.
It was very difficult capturing the watermark on film. It is very faint on McClellan's copy. I have seen the watermark on paper stock in possession of the Virginia Historical Society (Custis Lee's manuscript referred to in footnote), perfectly preserved, beautiful to behold, but the Society refuses to allow it to be photographed, looked at, but not
Collected by Joseph Ryan from the National Archives