We took a brief look at modelled drawings, using examples from The Natural Way to Draw, by Kimon Nicolaides. Reviewing that book in order to write this post, I came across (of course), Honoré Daumier.
If you ever want to look at a master of just about any form of drawing (and painting, for that matter), take a look at Daumier. One of the best places to do that is the Metropolitan Museum of Art, New York, https://www.metmuseum.org.
The picture below, "Street Show (Paillasse)" by Honoré Daumier, shown in black and white (from its use in the Nicolaides drawing book) and in its original colors (from the Metropolitan Museum of Art, New York, website) shows a wonderful use of both gesture (in the chalk lines) and modelling (in the added watercolor).
Also note that this is chalk with watercolor - who knew you could do that?!
I chose this drawing because it mixes gesture (look at the right arm and hand of the fellow leaning over the barrel) and modelling. The modelling is watercolor, added over the original chalk drawing, to give it bulk.
We don't need to belabor the modelling aspects - that will come naturally.