It was then that Mary wrote those letters which were afterward discovered in a casket and which were used against her when she was on trial for her life. These so-called Casket Letters, though we have not now the originals, are among the most extraordinary letters ever written. All shame, all hesitation, all innocence, are flung away in them. The writer is so fired with passion that each sentence is like a cry to a lover in the dark. As De Peyster says: "In them the animal instincts override and spur and lash the pen." Mary was committing to paper the frenzied madness of a woman consumed to her very marrow by the scorching blaze of unendurable desire. Events moved quickly. Darnley, convalescent from an attack of smallpox, was mysteriously destroyed by an explosion of gunpowder. Bothwell was divorced from his young wife on curious grounds. A dispensation allowed Mary to wed a Protestant, and she married Bothwell three months after Darnley's death. Here one sees the consummation of what had begun many years before in France. From the moment that she and Bothwell met, their union was inevitable. Seas could not sunder them. Other loves and other fancies were as nothing to them. Even the bonds of marriage were burst asunder so that these two fiery, panting souls could meet. It was the irony of fate that when they had so met it was only to be parted. Mary's subjects, outraged by her conduct, rose against her. As she passed through the streets of Edinburgh the women hurled after her indecent names. Great banners were raised with execrable daubs representing the murdered Darnley. The short and dreadful monosyllable which is familiar to us in the pages of the Bible was hurled after her wherever she went. With Bothwell by her side she led a wild and ragged horde of followers against the rebellious nobles, whose forces met her at Carberry Hill. Her motley followers melted away, and Mary surrendered to the hostile chieftains, who took her to the castle at Lochleven. There she became the mother of twins--a fact that is seldom mentioned by historians. These children were the fruit of her union with Bothwell. From this time forth she cared but little for herself, and she signed, without great reluctance, a document by which she abdicated in favor of her infant son. Even in this place of imprisonment, however, her fascination had power to charm. Among those who guarded her, two of the Douglas family--George Douglas and William Douglas--for love of her, effected her escape. The first attempt failed. Mary, disguised as a laundress, was betrayed by the delicacy of her hands. But a second attempt was successful. The queen passed through a postern gate and made her way to the lake, where George Douglas met her with a boat. Crossing the lake, fifty horsemen under Lord Claude Hamilton gave her their escort and bore her away in safety.