"A glass with little flowers," he replies.
And his answers are often curiously spontaneous and original. In the course of a reading-exercise in which the word Herbst, autumn, chanced to attract attention, Professor William Mackenzie asked him if he could explain what autumn was.
"It is the time when there are apples," Rolf replied.
On the same occasion, the same professor, without knowing what it represented, held out to him a card marked with red and blue squares:
"What's this?"
"Blue, red, lots of cubes," replied the dog.
Sometimes his repartees are not lacking in humour.
"Is there anything you would like me to do for you?" a lady of his acquaintance asked, one day.
And Master Rolf gravely answered:
"Wedelen," which means, "Wag your tail!"