The effects of her training upon her health, Margaret appears to have exaggerated. She thought it had "checked her growth, wasted her constitution," and would bring her to a "premature grave." While her lessons to her father by candle-light continued, there were sleeplessness, bad dreams, and morning headaches, but after this had gone on one year, Mr. Fuller was elected to Congress, spent most of his time in Washington, and a private tutor gave the lessons, presumably at seasonable hours. No one with a "broken constitution" could have performed her later literary labors, and she was not threatened with a "premature grave" when Dr. Frederick Henry Hedge made her acquaintance in Cambridge society. "Margaret," he says, "was then about thirteen,—a child in years, but so precocious in her mental and physical development, that she passed for eighteen or twenty. Agreeably to this estimate, she had her place in society as a full-grown lady. When I recall her personal appearance as she was then, and for ten or twelve years subsequent, I have the idea of a blooming girl of florid complexion and vigorous health, with a tendency to robustness of which she was painfully conscious, and which, with little regard to hygienic principles, she endeavored to suppress and conceal, thereby preparing for herself much future suffering." She had, he says, "no pretensions to beauty then, or at any time," yet she "was not plain," a reproach from which she was saved "by her blond and abundant hair, by her excellent teeth, by her sparkling, dancing, busy eyes," and by a "graceful and peculiar carriage of her head and neck." He adds that "in conversation she had already, at that early age, begun to distinguish herself, and made much the same impression in society that she did in after years," but that she had an excessive "tendency to sarcasm" which frightened shy young people and made her notoriously unpopular with the ladies.

At this period Margaret attended a seminary for young ladies in Boston. Cambridge was then, according to Col. Higginson, a vast, sparsely settled village, containing between two and three thousand inhabitants. In the Boston school, Dr. Hedge says, "the inexperienced country girl was exposed to petty persecutions from the dashing misses of the city," and Margaret paid them off by "indiscriminate sarcasms."

Margaret's next two years were spent at a boarding school in Groton. Her adventures in this school are supposed to be narrated in her dramatic story entitled "Mariana," in the volume called "Summer on the Lakes." Mariana at first carried all before her "by her love of wild dances and sudden song, her freaks of passion and wit," but abusing her privileges, she is overthrown by her rebellious subjects, brought to great humiliation, and receives some needed moral instructions.

At fifteen, Margaret returned to Cambridge and resumed her private studies, except that, for a Greek recitation, she attended an academy in which Dr. Oliver Wendell Holmes was then fitting for college. Her day at this period, as she gives it, was occupied thus: she rose before five, walked an hour, and practiced at the piano till seven: breakfasted and read French till eight; read Brown's philosophy, two or three lectures, till half past nine; went to school and studied Greek till twelve; recited, went home, and practiced till two; dined; lounged half an hour, read two hours in Italian, walked or rode, and spent her evenings leisurely with music or friends. Plainly she ought to have been one of the learned women of her generation.

A school composition of Margaret impressed her fellow pupil, Dr. Holmes, as he relates, with a kind of awe. It began loftily with the words, "It is a trite remark," a phrase which seemed to the boy very masterful. The girls envied her a certain queenliness of manner. "We thought," says one of them, "that if we could only come into school in that way, we could know as much Greek as she did." She was accustomed to fill the hood of her cloak with books, swing them over her shoulder, and march away. "We wished," says this lady, "that our mothers would let us have hooded cloaks, that we might carry our books in the same way."

It is known that Margaret had several love affairs and, in a later letter, she refers to one which belongs to this period, and which appears to have been the first of the series. She meets her old adorer again at the age of thirty and writes to a friend who knew of the youthful episode. He had the same powerful eye, calm wisdom, refined observation and "the imposing maniere d'etre which anywhere would give him influence among men"; but in herself, she says, "There is scarcely a fibre left of the haughty, passionate, ambitious child he remembered and loved."

Though a precocious girl and in a way fascinating, there is evidence that Margaret was crude and unformed socially, due perhaps to the habit of considering her mother as a negligible quantity. Cambridge ladies preserved an unpleasant portrait of the child as she appeared at a grand reception given by Mr. Fuller to President Adams in 1826, "one of the most elaborate affairs of the kind," says Col. Higginson, "that had occurred in Cambridge since the ante-revolutionary days of the Lechmeres and Vassals." Margaret ought to have been dressed by an artist, but apparently, a girl of sixteen, she was left to her own devices. She appeared, we are told, with a low-necked dress badly cut, tightly laced, her arms held back as if pinioned, her hair curled all over her head, and she danced quadrilles very badly. This escapade was not allowed to repeat itself. Certain kind and motherly Cambridge ladies took the neglected child in hand, tamed her rude strength, and subdued her manners. Col. Higginson mentions half a dozen of these excellent ladies, among them his mother, at whose feet "this studious, self-conscious, overgrown girl" would sit, "covering her hands with kisses and treasuring every word."

Chief among Margaret's motherly friends was Mrs. Eliza Farrar, wife of a Harvard professor, an authoress of merit, "of uncommon character and cultivation, who had lived much in Europe, and who, with no children of her own," became a kind of foster-mother to Margaret. She had Margaret "constantly at her own house, reformed her hairdresser, instructed her dressmaker, and took her to make calls and on journeys." Margaret was an apt pupil, and the good training of these many Cambridge mothers was apparent when, ten years later, Mr. Emerson made her acquaintance. "She was then, as always," he says, "carefully and becomingly dressed, and of lady-like self-possession."

The seven years in Cambridge, from Margaret's fifteenth to her twenty-third year, though uneventful, were, considering merely the pleasure of existence, the most delightful of her life. She was a school-girl as much or as little as she cared to be; her health, when not overtaxed, was perfect; her family though not rich, were in easy circumstances; her father was distinguished, having just retired from Congress after eight years of creditable service; and, partly perhaps from her father's distinction, she had access to the best social circles of Cambridge. "In our evening reunions," says Dr. Hedge, "she was always conspicuous by the brilliancy of her wit, which needed but little provocation to break forth in exuberant sallies, that drew around her a knot of listeners, and made her the central attraction of the hour. Rarely did she enter a company in which she was not a prominent object." Her conversational talent "continued to develop itself in these years, and was certainly" he thinks, "her most decided gift. One could form no adequate idea of her ability without hearing her converse.... For some reason or other, she could never deliver herself in print as she did with her lips." Emerson, in perfect agreement with this estimate says, "Her pen was a non-conductor." The reader will not think this true in her letters, where often the words seem to palpitate. Doubtless the world had no business to see her love letters, but one will find there a woman who, if she could speak as she writes, must have poured herself out in tidal waves.

Dr. Hedge was struck by two traits of Margaret's character, repeatedly mentioned by others, but to which it is worth while to have his testimony. The first was a passionate love for the beautiful: "I have never known one who seemed to derive such satisfaction from beautiful forms"; the second was "her intellectual sincerity. Her judgment took no bribes from her sex or her sphere, nor from custom, nor tradition, nor caprice."