THE LIFE OF THE AUTHOR.

...not knowing all of this in the meantime through friendly correspondence, his good friend urged him to return to France. To this end, he offered him, with the utmost nobility, everything he would deem necessary to continue his zeal for the investigation of the things that Nature produces according to his own desire. Although this might have appealed to the son, his father forbade him to do so; as he wrote to Lord Thevenot on the 30th of October, 1670. In the meantime, to give his angry father some pleasure, he brought his cabinet of curiosities, which was very rich, into neat order, and listed everything in an accurate index. In this tedious labor, he bore an incredible burden and suffered a sad loss of far too much time, as he often complained most painfully.

In the following year, 1671, he wanted to publish his writings on the Chameleon and on the Mayfly original: "Oeveraas", since he had fully completed this matter. However, he delayed that until the year 1675, although he had already begun it long before, in the year 1667 in France, and before that in Culemborg.

In the year 72, on the 1st of May, he gave and dedicated to the Royal Society in England three plates, upon which there were six depictions of the womb of a woman. Here was the neatest portrayal of the seed vessels, tubes, and ovaries. This had all been sketched out somewhat on the 21st of January, 1667, at the house of Professor van Horne, but it was only fully completed and adorned with a proper explanation on the 7th of May, 1671. Behold, thus appeared for the first time in public a proof of that art by which the arteries, blood veins, and their branches could be filled with wax; by this means, one could not only see them but also keep them uncorrupted for as long as one wished. And also, so that he might prove the truth of these depictions, he sent the same womb, prepared in this way, to the same Royal Society. He was moved to do this so that these just and knowledgeable men might pass their judgment upon the work itself. He also sought thereby to prove that the things which the famous van Horne had published in his Forerunner original: "Voorloper" regarding the seed vessels were first and primarily discovered by our author himself. Finally, the most powerful reason for this was to refute what Mr. Reynier de Graaf had written very sharply against him regarding the glory of the discoveries concerning the reproductive parts. For this reason, he chose the wise members of the English Society and empowered them to settle this dispute upon request and bring it to an end by their decision.

Around the same time, he investigated many other very useful things in Anatomy. He opened several fish in particular to learn to know the liver, spleen, and pancreas in them. He found the pancreas in them to be mostly very large, and the ducts of the same also very significant, and that they often entered the intestines in many places, quite widely. Then he investigated, with purpose and most accurately, the juice of this part in every way. He found that it was never anything that resembled acid. He also found whole little bottles full of this...