The following morning, the plaintiff's papers were laid before the court. The volume of the Spectator, and the letters already produced at Wyllys-Roof, were shown. In addition to these, the following papers were now brought forward: A letter addressed to the name of Benson, on board the British sloop-of-war, Ceres; another directed to William Bennet, on board the Dutch barque William, when at Batavia, nearly eighteen years since; this letter was important, as it was evidently written to an American sailor, and alluded to his having been recently shipwrecked on the coast of Africa, and taken up by a Dutch vessel. These documents were all received with great interest, and their probable authenticity seemed generally admitted. Mr. Reed then observed: "We shall close our evidence, gentlemen, by laying before you testimony, sufficient in itself to prove triumphantly the identity of the plaintiff, when connected with a small portion only of that which has preceded it." He drew from his papers an old Russia-leather pocketbook, with the initials W. S. stamped upon in large Gothic letters. Mr. Wyllys made an involuntary movement as it was held up for examination; that very pocket-book, or one exactly like it, had he given himself to the son of his old friend, the very last time he saw him. He watched the proceedings at this moment with intense interest--evident to everybody. "This pocket-book, gentlemen, is the property of the plaintiff," continued Mr. Reed. "The initials of his name, W. S., stamped upon it, are half-effaced, yet still sufficiently distinct to tell their story. But the contents of this precious book are of still greater importance to the interests of my client." Mr. Reed then opened it and drew from one side a letter, and read the address, "William Stanley, New York, care of Jonas Thomson, Master of the ship Dorothy Beck." "This letter, gentlemen of the jury, is signed John Stanley--it is from the father of William Stanley, in whose name I now submit it to your examination." The letter was then read; it corresponded entirely with the circumstances already known to the reader; its date, nature, handwriting, all were perfectly correct, and the signature was sworn to by several witnesses. Mr. Wyllys was evidently moved when the letter was read; he asked to look at it, and all eyes were turned on his venerable countenance, as he silently examined the paper. It was remarked that the hand which held the letter was not steady, and the features which bent over it betrayed perceptible agitation. Mr. Wyllys turned to Hazlehurst, as he finished reading the sheet. "It is undeniably genuine; the letter of John Stanley to his son!" he said. A short consultation succeeded between the defendants. Hazlehurst wrote a line or two on a slip of paper, and handed it to Mr. Wyllys, and then to Ellsworth and Mr. Grant.