{11} Mr. Munro calls the stone "a black agate," and does not mention its _provenance_. The engraving in his book does no justice to the portrait.
There is another gem representing Lucretius in the Vatican: of old it belonged to Leo X. The two gems are in all respects similar. A seal with this head, or one very like it, belonged to Evelyn, the friend of Mr. Pepys.