"The Tree of Knowledge is not that of Life." "It is the Professor von Holzen," said a stout woman who still keeps the egg and butter shop at the corner of St. Jacob Straat in The Hague; she is a Jewess, as, indeed, are most of the denizens of St. Jacob Straat and its neighbour, Bezem Straat, where the fruit-sellers live-"it is the Professor von Holzen, who passes this way once or twice a week. He is a good man."