I have been re-inking illustrations by Joseph Clement Coll.
Initially, I started on this project because the scans were hard to read. It appeared that the black lines in the line art had melded together into large blobs of black in many places. But as I re-inked these, I learned a lot! I can highly recommend this way of studying your favorite artist.
As an example, this:
Looked like this in the original scan I had:
First, I started on a separate layer and tried to reconstruct the poses of the men in outline. Then I decided on a tonal composition, reducing the background to gray to highlight the men. This was all done digitally.
Here are a few more: