Decapitation of the Union

[Eva Elisabeth]

"The glass was removed from the window and encased in a wooden frame. A piece of velvet was placed behind it and thus the handwriting was made more distinct....Miss Mary McHenry, daughter of the proprietor of the McHenry House, presented the framed glass to the War Department after the assassination...It is still in the possession of that bureau of the government. (Citing Century Magazine , April 1896)"

So - is the image Roger posted above an original photography of this original corpus delicti? If so, has a graphologist ever commented on the question?
Just to compare:
       
(Quite different!)