At the time of this communication, Charnock was twenty-eight years old, and two years after his first master fell sick while attending his furnace for the completion of the red stone. He sent for Charnock, made him the heir of his work, and died after giving him instructions how to proceed. Charnock began his operations on the materials left by his leader, and was much perplexed by the difficulty of keeping the fire equal. He often started out of his sleep to examine the fuel; but after all his care, which continued during the space of several months, the frame of wood that covered the furnace took fire during a short period of his absence, and when, smelling the burning, he ran up to his laboratory, he discovered that his work was completely destroyed. This occurred on January 1, 1555. To repair the mischief he was obliged to recommence at the first part of the process, and he hired a servant to assist in taking care of the fire. In the course of two months certain signs filled him with hopes of success, when his dependence on his servant proved the ruin of his work. He discovered that this unfaithful assistant would let the fire nearly out, and then, to conceal his neglect, would rekindle it with grease till it was so hot as to scorch the matter beyond recovery. In the third attempt, Charnock resolved to proceed without help. His fire cost him three pounds a week, and he was obliged to sell some rings and jewels to maintain it. He made good progress in the course of eight months, and expected to be rewarded in a little time for all his labours; but at this critical period he was impressed to serve as a soldier at the siege of Calais. Furious with disappointment, he took a hatchet, smashed his glasses, furnace, and apparatus, and threw them out of the house. He wrote his “Breviary of Philosophy” in 1557, and the “Enigma of Alchemy” in 1572, with a memorandum, dated 1574, when he was fifty years old. Therein he declares his attainment of the gold-producing powder when his hairs were white. The “Breviary” claims to describe all the vessels and instruments which are required in the science; a potter, a joiner, and a glassmaker must lend their several services. The address of one of these artificers, specially recommended by the author, is said to be Chiddinfold in Sussex; he could manufacture egg-shaped glasses which opened and shut “as close as a hair.” The regulation of the philosophical fire is described in this curious poem, but the rest of its information is of a purely autobiographical kind. GIOVANNI BRACCESCO.