As Henri traveled, he sketched constantly. Not many artwork examples from his voyage remain but I was lucky enough to find another one today.
The following undated sketch is titled "Paysage Américain" or American Countryside. It is not safe to assume that it is from his time in the U.S. but it seems likely due to what is on the back.
Henri was learning Spanish as he was heading towards Mexico and other points South and on the back of his sketch he has written a conjugation table for the Spanish verbs amar, temer & partir.