Ford's Theater stage diagram

[Dennis Urban]

That drawing and legend looks like something I have seen in the past but don't know where. The website from which it came, NIH National Library of Medicine, does not give attribution to the location of the original page. It does look like a page out of a newspaper which may have been drawn at the time pictures were taken of the inside of the theatre. One place the drawing does NOT appear is in the 1963 book by the Department of the Interior book, Restoration of Ford's Theatre. Several other drawings of the interior of the theatre and stage area are reproduced in the book, including that of John T. Ford done in May 1865 while confined in the Old Capitol Prison. I am curious to know the origin of this drawing. Perhaps one of the history slueths on this site can determine that for us.