I am put upon a committee to prepare a device for a golden medal, to commemorate the surrender of Boston to the American arms, and upon another to prepare devices for a great seal for the confederated States. There is a gentleman here of French extraction, whose name is Du Simitiere, a painter by profession, whose designs are very ingenious, and his drawings well executed. He has been applied to for his advice. I waited on him yesterday, and saw his sketches. For the medal he proposes, Liberty, with her spear and pileus, leaning on General Washington. The British fleet in Boston harbor with all their sterns towards the town, the American troops marching in. For the seal, he proposes the arms of the several nations from whence America has been peopled, as English, Scotch, Irish, Dutch, German, etc., each in a shield. On one side of them, Liberty with her pileus, on the other, a rifler in his uniform, with his rifle-gun in one hand and his tomahawk in the other; this dress and these troops, with this kind of armor, being peculiar to America, unless the dress was known to the Romans. Dr. Franklin showed me yesterday a book containing an account of the dresses of all the Roman soldiers, one of which appeared exactly like it. This M. du Simitiere is a very curious man. He has begun a collection of materials for a history of this revolution. He begins with the first advices of the tea ships. He cuts out of the newspapers every scrap of intelligence and every piece of speculation, and pastes it upon clean paper, arranging them under the head of that State to which they belong, and intends to bind them up in volumes. He has a list of every speculation and pamphlet concerning independence, and another of those concerning forms of government. Dr. F. proposes a device for a seal: Moses lifting up his wand and dividing the Red Sea, and Pharaoh in his chariot overwhelmed with the waters. This motto, "Rebellion to tyrants is obedience to God." Mr. Jefferson proposed the children of Israel in the wilderness, led by a cloud by day and a pillar of fire by night; and on the other side, Hengist and Horsa, the Saxon chiefs from whom we claim the honor of being descended, and whose political principles and form of government we have assumed. I proposed the choice of Hercules, as engraved by Gribelin, in some editions of Lord Shaftesbury's works. The hero resting on his club. Virtue pointing to her rugged mountain on one hand, and persuading him to ascend. Sloth, glancing at her flowery paths of pleasure, wantonly reclining on the ground, displaying the charms both of her eloquence and person, to seduce him into vice. But this is too complicated a group for a seal or medal, and it is not original.