sentences:  After Lucas Bauer's death, his wife, Therese continued to give her three sons lessons in art and illustration.Josef succeeded his father as court painter and eventually became keeper of the gallery in Vienna.Francis and Ferdinand acquired their first experience of botanical illustration with the arrival of Father Norbert Boccius, Abbot of Feldsberg, in 1763, and produced over 2000 watercolour drawings of plant specimens under his guidance.