A number of fully-painted "studies" like this one were done in preparation for each piece, from which he'd distill the folds and forms into very streamlined finals, removing unnecessary elements.
His hatch-work is an unmistakable stylistic motif. Note the almost Disney-like angularity of the hand pinning the medal, long before Disney.
Why is she kissing locked-up baby cupid? It's so gorgeous I don't care
Major respect goes out to Civil War painter Mort Kunstler. I got to know his work when my younger brother went through a few years of Civil War interest (in middle-school!). His subscription to Civil War Magazine always had Kunstler art in it. Mort happens to own probably a quarter of the original artwork in the show, and from what I'm told it's only a portion of his collection of classic Illustration. So, major respect for his collecting this fine work, and for loaning it to the show. I heard he was in attendance for a bit, but wouldn't have recognized him.
Anyway, being out in the area, you'll no doubt be seeing a number of entries relating to the SI. I may not be a giant in my own time, but it's nice to walk in the footsteps of those who were.