Boat
The Boat appears in the novel as a small, hired vessel that plays a decisive role in two of the story's most critical sequences: Milady's escape from captivity and her subsequent execution. More than a mere conveyance, it becomes a symbol of the precarious boundary between liberty and doom, carrying its passenger first toward vengeance and then toward the justice she has so long evaded.
Escape from the Castle
After John Felton, the Puritan lieutenant, has been seduced by Milady's fabricated tale of persecution, he orchestrates her flight from Lord de Winter's seaside castle. Having filed through the bars of her window and descended a rope ladder with Milady in his arms, Felton carries her across the rocks to the edge of the sea. There he whistles, and a similar signal replies from the darkness. A boat appears, rowed by four men, and Felton, unwilling to trust his precious burden to anyone else, wades into the water up to his middle to place her aboard. The boat, described as bounding over the waves like a nutshell, carries them to a waiting sloop anchored offshore. This sloop, which Felton has chartered for a thousand pistoles (five hundred already paid, the remainder due upon arrival at Boulogne), is commanded by a captain named Jack Butler. It is aboard this vessel that Milady, having regained consciousness and found her wrists bruised from the rope that bound them, learns that Felton intends to go to Portsmouth to assassinate the Duke of Buckingham. The sloop conveys Felton to a small bay near Portsmouth, from which he will proceed on foot to the Admiralty, and then carries Milady across the Channel to France, where she lands at Boulogne and immediately dispatches a letter to Cardinal Richelieu announcing Buckingham's impending death.
The Vessel of Execution
Weeks later, after Milady has poisoned Constance Bonacieux and fled to the village of Armentieres on the banks of the Lys River, the four friends—d'Artagnan, Athos, Porthos, and Aramis—along with Lord de Winter and the masked Executioner of Lille, pursue her to a small isolated house near a ferry. There they try and condemn her. The executioner binds her hands and feet, and the group proceeds to the riverbank. A boat is used to transport Milady across the Lys to the opposite shore, where the sentence is to be carried out. During the crossing, Milady manages to untie the cord around her feet, and as the boat nears the far bank, she leaps ashore and attempts to flee. But the ground is moist; she slips and falls to her knees. The executioner follows, raises his large sword, and with a single blow beheads her. He then takes off his red cloak, spreads it upon the ground, lays the body and head within it, ties the bundle by its four corners, and lifts it onto his back. Returning to the boat, he rows to the middle of the stream, suspends his burden over the water, and cries, "Let the justice of God be done!" before letting the corpse drop into the depths of the river. The boat, which had been the instrument of Milady's escape, thus becomes the final witness to her annihilation, its passage across the water marking the transition from life to the silence of the grave.