“Those two [ Alma Tadema and Roelofs, teaching both Mesdag in Brussels, 1867-69] instructed in exactly the opposite way, you know. For example, Roelofs used to say: you must put more color in that drawing [often meant: watercolor]. And you didn't always saw it yourself in a moment, because you were not yet that far and as high as the master himself was. But Tadema did something completely different; he had more the manners of a professor, who gave his lectures. So Roelofs and he actually complemented each other. (translation from original Dutch: Fons Heijnsbroek)”