On the third day of his imprisonment the Advocate wrote this letter to his family:-- "My very dear wife, children, children-in-law, and grandchildren,--I know that you are sorrowful for the troubles which have come upon me, but I beg you to seek consolation from God the Almighty and to comfort each other. I know before the Lord God of having given no single lawful reason for the misfortunes which have come upon me, and I will with patience await from His Divine hand and from my lawful superiors a happy issue, knowing well that you and my other well-wishers will with your prayers and good offices do all that you can to that end. "And so, very dear wife, children, children-in-law, and grandchildren, I commend you to God's holy keeping. "I have been thus far well and honourably treated and accommodated, for which I thank his princely Excellency. "From my chamber of arrest, last of August, anno 1618. "Your dear husband, father, father-in-law, and grand father, "JOHN OF BARNEVELD." On the margin was written: "From the first I have requested and have at last obtained materials for writing." A fortnight before the arrest, but while great troubles were known to be impending, the French ambassador extraordinary, de Boississe, had audience before the Assembly of the States-General. He entreated them to maintain the cause of unity and peace as the foundation of their state; "that state," he said, "which lifts its head so high that it equals or surpasses the mightiest republics that ever existed, and which could not have risen to such a height of honour and grandeur in so short a time, but through harmony and union of all the provinces, through the valour of his Excellency, and through your own wise counsels, both sustained by our great king, whose aid is continued by his son."--"The King my master," he continued, "knows not the cause of your disturbances. You have not communicated them to him, but their most apparent cause is a difference of opinion, born in the schools, thence brought before the public, upon a point of theology. That point has long been deemed by many to be so hard and so high that the best advice to give about it is to follow what God's Word teaches touching God's secrets; to wit, that one should use moderation and modesty therein and should not rashly press too far into that which he wishes to be covered with the veil of reverence and wonder. That is a wise ignorance to keep one's eyes from that which God chooses to conceal. He calls us not to eternal life through subtle and perplexing questions."