About this time the crafty scholar hit upon a last desperate expedient to regain his footing in the community. Hitherto a complete hermit, he now determined to contract an advantageous marriage; securing as a bride some lady whose unquestioned position would make all ostracism of his home impossible. It may be that he also had deeper reasons for wishing an alliance; reasons so far outside the known cosmic sphere that only papers found a century and a half after his death caused anyone to suspect them; but of this nothing certain can ever be learned. Naturally he was aware of the horror and indignation with which any ordinary courtship of his would be received, hence he looked about for some likely candidate upon whose parents he might exert a suitable pressure. Such candidates, he found, were not at all easy to discover; since he had very particular requirements in the way of beauty, accomplishments, and social security. At length his survey narrowed down to the household of one of his best and oldest ship-captains, a widower of high birth and unblemished standing named Dutee Tillinghast, whose only daughter Eliza seemed dowered with every conceivable advantage save prospects as an heiress. Capt. Tillinghast was completely under the domination of Curwen; and consented, after a terrible interview in his cupolaed house on Power's Lane hill, to sanction the blasphemous alliance.
Eliza Tillinghast was at that time eighteen years of age, and had been reared as gently as the reduced circumstances of her father permitted. She had attended Stephen Jackson's school opposite the Court-House Parade; and had been diligently instructed by her mother, before the latter's death of smallpox in 1757, in all the arts and refinements of domestic life. A sampler of hers, worked in 1753 at the age of nine, may still be found in the rooms of the Rhode Island Historical Society. After her mother's death she had kept the house, aided only by one old black woman. Her arguments with her father concerning the proposed Curwen marriage must have been painful indeed; but of these we have no record. Certain it is that her engagement to young Ezra Weeden, second mate of the Crawford packet Enterprise, was dutifully broken off, and that her union with Joseph Curwen took place on the seventh of March, 1763, in the Baptist church, in the presence of the most distinguished assemblages which the town could boast; the ceremony being performed by the younger Samuel Winsor. The Gazette mentioned the event very briefly. and in most surviving copies the item in question seems to be cut or torn out. Ward found a single intact copy after much search in the archives of a private collector of note, observing with amusement the meaningless urbanity of the language:
'Monday evening last, Mr. Joseph Curwen, of this Town, Merchant, was married to Miss Eliza Tillinghast, Daughter of Capt. Dutee Tillinghast, a young Lady who has real Merit, added to a beautiful Person, to grace the connubial State and perpetuate its Felicity.'
The collection of Durfee-Arnold letters, discovered by Charles Ward shortly before his first reputed madness in the private collection of Melville F. Peters, Esq., of George St. , and covering this and a somewhat antecedent period, throws vivid light on the outrage done to public sentiment by this ill-assorted match. The social influence of the Tillinghasts, however, was not to be denied; and once more Joseph Curwen found his house frequented by persons whom he could never otherwise have induced to cross his threshold. His acceptance was by no means complete, and his bride was socially the sufferer through her forced venture; but at all events the wall of utter ostracism was somewhat torn down. In his treatment of his wife the strange bridegroom astonished both her and the community by displaying an extreme graciousness and consideration. The new house in Olney Court was now wholly free from disturbing manifestations, and although Curwen was much absent at the Pawtuxet farm which his wife never visited, he seemed more like a normal citizen than at any other time in his long years of residence. Only one person remained in open enmity with him, this being the youthful ship's officer whose engagement to Eliza Tillinghast had been so abruptly broken. Ezra Weeden had frankly vowed vengeance; and though of a quiet and ordinarily mild disposition, was now gaining a hate-bred, dogged purpose which boded no good to the usurping husband.
On the seventh of May, 1765, Curwen's only child Ann was born; and was christened by the Rev. John Graves of King's Church, of which both husband and wife had become communicants shortly after their marriage, in order to compromise between their respective Congregational and Baptist affiliations. The record of this birth, as well as that of the marriage two years before, was stricken from most copies of the church and town annals where it ought to appear; and Charles Ward located both with the greatest difficulty after his discover of the widow's change of name had apprised him of his own relationship, and engendered the feverish interest which culminated in his madness. The birth entry, indeed, was found very curiously through correspondence with the heirs of the loyalist Dr. Graves, who had taken with him a duplicate set of records when he left his pastorate at the outbreak of the Revolution. Ward had tried this source because he knew that his great-great-grandmother Ann Tillinghast Potter had been an Episcopalian.
Shortly after the birth of his daughter, an event he seemed to welcome with a fervour greatly out of keeping with his usual coldness, Curwen resolved to sit for a portrait. This he had painted by a very gifted Scotsman named Cosmo Alexander, then a resident of Newport , and since famous as the early teacher of Gilbert Stuart. The likeness was said to have been executed on a wall-panel of the library of the house in Olney Court , but neither of the two old diaries mentioning it gave any hint of its ultimate disposition. At this period the erratic scholar shewed signs of unusual abstraction, and spent as much time as he possibly could at his farm on the Pawtuxet Road . He seemed, as was stated, in a condition of suppressed excitement or suspense; as if expecting some phenomenal thing or on the brink of some strange discovery. Chemistry or alchemy would appear to have played a great part, for he took from his house to the farm the greater number of his volumes on that subject.
His affectation of civic interest did not diminish, and he lost no opportunities for helping such leaders as Stephen Hopkins, Joseph Brown, and Benjamin West in their efforts to raise the cultural tone of the town, which was then much below the level of Newport in its patronage of the liberal arts. He had helped Daniel Jenckes found his bookshop in 1763, and was thereafter his best customer; extending aid likewise to the struggling Gazette that appeared each Wednesday at the Sign of Shakespeare's Head. In politics he ardently supported Governor Hopkins against the Ward party whose prime strength was in Newport , and his really eloquent speech at Hacher's Hall in 1765 against the setting off of North Providence as a separate town with a pro-Ward vote in the General Assembly did more than any other thing to wear down the prejudice against him. But Ezra Weeden, who watched him closely, sneered cynically at all this outward activity; and freely swore it was no more than a mask for some nameless traffick with the blackest gulfs of Tartarus. The revengeful youth began a systematic study of the man and his doings whenever he was in port; spending hours at night by the wharves with a dory in readiness when he saw lights in the Curwen warehouses, and following the small boat which would sometimes steal quietly off and down the bay. He also kept as close a watch as possible on the Pawtuxet farm, and was once severely bitten by the dogs the old Indian couple loosed upon him.