In Henri's papers I found a number of his high school report cards. It was interesting that of all the items he could have kept, these were some of the items he set aside. I think it speaks to his appreciation of education and intellectual rigor. He would have been roughly 16 or so at the time.
Collége de Neuchâtel Promotions de 1840, Mention Honorable
Collége de Neuchâtel Témoinage de Satisfaction, 1841