Pendant portraits of Maerten Soolmans and Oopjen Coppit by Eugène Fromentin in 1877 with the remark that they were examples of Rembrandt at his best and were painted in the same period that Rembrandt painted his "Anatomy Lesson of Dr. Nicolaes Tulp", traditionally marking the beginning of his career in Amsterdam. Clearly, the flamboyance of these young newlyweds did more to launch Rembrandt's career as a portrait painter for the Amsterdam upper class than his sober depiction of a class of serious students in Leiden. The entire Van Loon collection was sold to Rothschild for 40,000 pounds, which at the time was over a million francs. Wilhelm von
Nicolaes Tulp but also because of the fantastic stories that he relates. An example; Jan de Doot, a blacksmith in Amsterdam, was in such pain from a bladder stone, that he sharpened a knife and removed it himself, because he refused to be the victim of the 'stone cutters'. These were the barber-surgeons who performed such procedures but had a high death rate. To everyone's surprise, Jan de Doot survived this operation which was said to produce a stone the size of an egg. A painting illustrating this story is in the collection of the Anatomy Museum of Leiden. Tulp minutely described