THE sale by Messrs. Sotheby of an interesting relic of the mathematician and astrologer Dr. John Dee, who was patronized by Queen Elizabeth, was recorded in The Times of May 5. The relic is a gold disk 3 1/2 in. in diameter weighing 1 oz. 4 dwt. 5 gr., bearing the London date letter for 1589 and engraved with a diagram of the “Vision of the Four Castles” which appeared to his medium Edward Kelley, on the morning of June 20, 1584, at a house in St. Stephen's Street, Cracow, where the two men were staying. The diagram is reproduced in “A True and Faithful Relation of what passed for many Years between Dr. John Dee... and some Spirits” published in 1659 by Dr. Meric Casaubon. The disk was bought by the British Museum for £230.