"Your son is in debt again," wrote Aerssens, on one occasion, "and troubled for money. He is in danger of going to the usurers. He says he cannot keep himself for less than 200 crowns a month. This is a large allowance, but he has spent much more than that. His life is not irregular nor his dress remarkably extravagant. His difficulty is that he will not dine regularly with me nor at court. He will keep his own table and have company to dinner. That is what is ruining him. He comes sometimes to me, not for the dinner nor the company, but for tennis, which he finds better in my faubourg than in town. His trouble comes from the table, and I tell you frankly that you must regulate his expenses or they will become very onerous to you. I am ashamed of them and have told him so a hundred times, more than if he had been my own brother. It is all for love of you . . . . I have been all to him that could be expected of a man who is under such vast obligations to you; and I so much esteem the honour of your friendship that I should always neglect my private affairs in order to do everything for your service and meet your desires . . . . . If M. de Craimgepolder comes back from his visit home, you must restrict him in two things, the table and tennis, and you can do this if you require him to follow the King assiduously as his service requires." Something at a future day was to be heard of William of Barneveld, as well as of his elder brother Reinier, and it is good, therefore, to have these occasional glimpses of him while in the service of the King and under the supervision of one who was then his father's devoted friend, Francis Aerssens. There were to be extraordinary and tragical changes in the relations of parties and of individuals ere many years should go by. Besides the sons of the Advocate, his two sons-in-law, Brederode, Seignior of Veenhuizep, and Cornelis van der Myle, were constantly employed? in important embassies. Van der Myle had been the first ambassador to the great Venetian republic, and was now placed at the head of the embassy to France, an office which it was impossible at that moment for the Advocate to discharge. At the same critical moment Barneveld's brother Elias, Pensionary of Rotterdam, was appointed one of the special high commissioners to the King of Great Britain. It is necessary to give an account of this embassy. They were provided with luminous and minute instructions from the hand of the Advocate.