What the naked eye cannot see in this check they reveal.

Besides, a little iodine vapor brings out the original 'Green & Co.' on it.
"We have found out also that the protective coloring was restored by water color.

That was easy.

Where the paper was scratched and the sizing taken off, it has been painted with a resinous substance to restore the glaze, to the eye.

Well, a little alcohol takes that off, too.