An illustration for Dr. Patricia Crown of the University of New Mexico, showing the technique presumably used a thousand years ago by the inhabitants of Chaco Canyon, New Mexico, to froth a drink made from cacao traded up from Mexico. Arguing the details with three archaeologists and four Pueblo consultants took six weeks and about fifty emails. Love this kind of dialogue!
The story of chocolate in Chaco is fascinating. Here’s Dr. Crown’s brief introduction to it:
More of my favorite kind of illustration, historical recreation: