Some articles on hendenberger:

Gottfried Mind - Art Education
1780 and 1785, he came to the painter Sigmund Hendenberger at Bern ... At the time when Hendenberger was painting that since-published picture of the peasant cleaving wood before his cottage, with his wife sitting by, and feeding her child with pap out of ... he went into a corner, and drew the cat, which Hendenberger liked so much that he made his new pupil finish it out, and the master copied the scholar's work ...