I tried backlighting the box by placing it up against a window and putting the curtains around the box to block out the other light. It worked!
Each scroll "lived" in its own viewing box. The translucent paper scrolls were illuminated by placing the box up against a window so that the sunlight could shine through from behind the scroll. Curtains
of heavy fabric were placed around the box to block out the other light.
I had to try this! The book jacket of Carmontelle's Landscape Transparencies, was printed on translucent
paper, about ten inches high. I just happen to have a crankie box that would hold a scroll that size.I loaded the book jacket into the crankie box,
put the box against a window and gathered the curtains around top and sides of the box. The curtains were not of heavy fabric but they still blocked out some of the extraneous light, illuminating the scroll even more. It worked!