Concerning the history of Sancy No. 3, it is related that when Baron Sancy returned from Constantinople, where he had been as ambassador, he exhibited a large and beautiful diamond, which he had acquired for the sum of $120,000. This statement is somewhat obscure, from the fact that the ambassador was not Harlai de Sancy, but his son Achille, who was also sent on various missions by Richelieu during the years 1626 to 1635. However, it is certain that a new diamond was imported into France by one of the Sancys, and that it was a remarkable gem. It was described as being of the form of an almond, faceted all over its surface with small facets, after the manner practised in India. The weight of this gem has been variously stated; and these conflicting statements have served to increase the mystery concerning the Sancy gems. The weight of the diamond has been given as high as one hundred and twenty-six karats; but Delisle assured Dutens that he saw M. Jacquemin, the Crown jeweller, weigh the gem, and that it did not exceed fifty-four karats. Nevertheless, the famous inventory of the French gems in 1792 gives 33¹²⁄₁₆ karats as the true weight of the famous Sancy diamond. How shall we explain this wide discrepancy? Forty-two years after the death of the Baron, the diamond passed into the hands of Henrietta Maria, the queen-dowager of England, and subsequently into the possession of James II. The unfortunate king, while in exile, sold the gem to Louis IV. for the sum of $125,000; and here its history ends. During the latter part of the seventeenth century, Robert de Berquen, a descendant of the famous lapidary, wrote his “Merveilles des Indes,” and therein he describes the diamond brought from India by Baron Sancy, as then in possession of the Queen of England, and being almond-like in form, faceted on both sides, and of fifty-four karats in weight. This account agrees with those of the French jewellers, and serves to connect the history of the gem up to this period. Not many years after the bold robbery of 1792, a large diamond was acquired, by some mysterious means, by the widow of Charles IV. of Spain, who gave it to the notorious Prince of Peace Godoy. In 1838, Princess Paul Demidoff is said to have purchased it for half a million of roubles; and it is also certain that the Demidoff family sold it in 1865, to the Parsee millionnaire, Sir Jansetjee Jejeebhoy of Bombay, for $100,000.