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In 1766 came the final change in Joseph Curwen. It was very sudden, and gained wide notice amongst the curious townsfolk; for the air of suspense and expectancy dropped like an old cloak, giving instant place to an ill-concealed exaltation of perfect triumph. Curwen seemed to have difficulty in restraining himself from public harangues on what he had found or learned or made; but apparently the need of secrecy was greater than the longing to share his rejoicing, for no explanation was ever offered by him. It was after this transition, which appears to have come early in July, that the sinister scholar began to astonish people by his possession of information which only their long-dead ancestors would seem to be able to impart.
But Curwen’s feverish secret activities by no means ceased with this change. On the contrary, they tended rather to increase; so that more and more of his shipping business was handled by the captains whom he now bound to him by ties of fear as potent as those of bankruptcy had been. He altogether abandoned the slave trade, alleging that its profits were constantly decreasing. Every possible moment was spent at the Pawtuxet farm; although there were rumours now and then of his presence in places which, though not actually near graveyards, were yet so situated in relation to graveyards that thoughtful people wondered just how thorough the old merchant’s change of habits really was. Ezra Weeden, though his periods of espionage were necessarily brief and intermittent on account of his sea voyaging, had a vindictive persistence which the bulk of the practical townsfolk and farmers lacked; and subjected Curwen’s affairs to a scrutiny such as they had never had before.
Many of the odd manoeuvres of the strange merchant’s vessels had been taken for granted on account of the unrest of the times, when every colonist seemed determined to resist the provisions of the Sugar Act which hampered a prominent traffick. Smuggling and evasion were the rule in Narragansett Bay, and nocturnal landings of illicit cargoes were continuous commonplaces. But Weeden, night after night following the lighters or small sloops which he saw steal off from the Curwen warehouses at the Town Street docks, soon felt assured that it was not merely His Majesty’s armed ships which the sinister skulker was anxious to avoid. Prior to the change in 1766 these boats had for the most part contained chained negroes, who were carried down and across the bay and landed at an obscure point on the shore just north of Pawtuxet; being afterward driven up the bluff and across country to the Curwen farm, where they were locked in that enormous stone outbuilding which had only five high narrow slits for windows. After that change, however, the whole programme was altered. Importation of slaves ceased at once, and for a time Curwen abandoned his midnight sailings. Then, about the spring of 1767, a new policy appeared. Once more the lighters grew wont to put out from the black, silent docks, and this time they would go down the bay some distance, perhaps as far as Namquit Point, where they would meet and receive cargo from strange ships of considerable size and widely varied appearance. Curwen’s sailors would then deposit this cargo at the usual point on the shore, and transport it overland to the farm; locking it in the same cryptical stone building which had formerly received the negroes. The cargo consisted almost wholly of boxes and cases, of which a large proportion were oblong and heavy and disturbingly suggestive of coffins.