Of his noctograph Prescott made constant use. For composition he employed it almost altogether, seldom or never dictating to a scribe. Obviously, however, the instrument allowed no erasures or corrections to be made, and the writer must go straight forward with his task; since to go back and try to alter what had been once set down would make the whole illegible. Hence arose the necessity of what Irving once described as "pre-thinking,"—the determination not only of the content but of the actual form of the sentence before it should be written down. In this pre-thinking Prescott showed a power of memory and of visualisation that was really wonderful. To carry in his mind the whole of what had been read over to him in a session of several hours,—names, dates, facts, authorities,—and then to shape his narrative, sentence by sentence, before setting down a word, and, finally, to bear in mind the whole structure of each succeeding paragraph and the form in which they had been carefully built up—this was, indeed, an intellectual and literary achievement of an unusual character. Of course, such a power as this did not come of itself, but was slowly gained by persistent practice and unwearied effort. His personal memoranda show this: "Think closely," he writes, "gradually concentrating the circle of thought." And again: "Think continuously and closely before taking up my pen. Make corrections chiefly in my own mind." And still again: "Never take up my pen until I have travelled over the subject so often that I can write almost from memory."

But in 1827, the time had not yet come for composition. He was hearing books read to him and was taking copious notes. How copious these were, his different secretaries have told; and besides, great masses of them have been preserved as testimony to the minute and patient labour of the man who made and used them. As his reader went on, Prescott would say, "Mark that!" whenever anything seemed to him especially significant. These marked passages were later copied out in a large clear hand for future reference. When the time came, they would be read, studied, compared, verified, and digested. Sometimes he spent as much as five days in thus mastering the notes collected for a single chapter. Then at least another day would be given to reflection and (probably) to composition, while from five to nine days more might go to the actual writing out of the text. This power of Prescott's increased with constant exercise. Later, he was able to carry in his head the whole of the first and second chapters of his Conquest of Peru (nearly sixty pages) before committing them to paper, and in preparing his last work, Philip II., he composed and memorised the whole fifth, sixth, and seventh chapters of Book II., amounting to seventy-two printed pages.

Prescott had elaborated a system of his own for the regulation of his daily life while he was working. This system was based upon the closest observation, extending over years, of the physical effect upon him of everything he did. The result was a regimen which represented his customary mode of living. Rising early in the morning, he took outdoor exercise, except during storms of exceptional severity. He rode well and loved a spirited horse, though sometimes he got a fall from letting his attention stray to his studies instead of keeping it on the temper of his animal. But, in the coldest weather, on foot or in the saddle, he covered several miles before breakfast, to which he always came back in high spirits, having, as he expressed it, "wound himself up for the day." After a very simple breakfast, he went at once to his library, where, for an hour or so, he chatted with Mrs. Prescott or had her read to him the newspapers or some popular book of the day. By ten o'clock, serious work began with the arrival of his secretary, with whom he worked diligently until one o'clock, for he seldom sat at his desk for more than three consecutive hours. A brisk walk of a mile or two gave him an appetite for dinner, which was served at three o'clock, an hour which, in the year 1827, was not regarded as remarkable, at least in Massachusetts. This was a time of relaxation, of chat and gossip and family fun; and it was then that Prescott treated himself to the amount of wine which he had decided to allow himself. His fondness for wine has been already casually mentioned. To him the question of its use was so important, that once, for two years and nine months, he recorded every day the exact amount that he had drunk and the effect which it had had upon his eye and upon his general health. A further indulgence which followed after dinner was the smoking of a mild cigar while his wife read or talked to him. Then, another walk or drive, a cup of tea at five, and finally, two or more industrious hours with his secretary, after which he came down to the library and enjoyed the society of his family or of friends who happened in.

This, it will be seen, was not the life of a recluse or of a Casaubon, though it was a life regulated by a wise discretion. To adjust himself to its routine, Prescott had to overcome many of his natural tendencies. In the first place, he was, as has been already noted, of a somewhat indolent disposition; and a steady grind, day after day and week after week, was something which he had never known in school or college. Even now in his maturity, and with the spurring of a steady purpose to urge him on, he often faltered. His memoranda show now and then a touch of self-accusation or regret.

"I have worked lazily enough, or rather have been too busy to work at all. Ended the old year very badly."

"I find it as hard to get under way, as a crazy hulk that has been boarded up for repairs."

How thoroughly he conquered this repugnance to hard work is illustrated by a pathetic incident which happened once when he was engaged upon a bit of writing that interested him, but when he was prevented by rheumatic pains from sitting upright. Prescott then placed his noctograph upon the floor and lay down flat beside it, writing in this attitude for many hours on nine consecutive days rather than give in.

He tried some curious devices to penalise himself for laziness. He used to persuade his friends to make bets with him that he would not complete certain portions of writing within a given time. This sort of thing was a good deal of a make-believe, for Prescott cared nothing about money and had plenty of it at his disposal; and when his friends lost, he never permitted them to pay. He did a like thing on a larger scale and in a somewhat different way by giving a bond to his secretary, Mr. English, binding himself to pay a thousand dollars if within one year from September, 1828, Prescott should not have written two hundred and fifty pages of Ferdinand and Isabella. This number of pages was specified, because Prescott dreaded his own instability of purpose, and felt that if he should once get so far as two hundred and fifty pages, he would be certain to go on and finish the entire history. Other wagers or bonds with Mr. English were made by Prescott from time to time, all with the purpose of counteracting his own disposition to far niente.

His settled mode of life also compelled him in some measure to give up the delights of general social intercourse and the convivial pleasures of which he was naturally fond. There were, indeed, times when he did let his work go and enjoyed a return to a freer life, as when in the country at Pepperell he romped and rollicked like a boy; or when in Boston, he was present at some of the jolly little suppers given by his friends and so much liked by him. But on the whole, neither his health nor the arduous researches which he had undertaken allowed him often to break the regularity of his way of living. Nothing, indeed, testifies more strikingly to his naturally buoyant disposition than the fact that years of unvarying routine were unable to make of Prescott a formalist or to render him less charming as a social favourite. In his study he was conspicuously the scholar, the investigator; elsewhere he was the genial companion, full of fun and jest, telling stories and manifesting that gift of personal attractiveness which compelled all within its range to feel wholly and completely at their ease. No writer was ever less given to literary posing. It is, indeed, an extraordinary fact that although Prescott was occupied for ten whole years in preparing his Ferdinand and Isabella, during all that time not more than three persons outside of his own family knew that he was writing a book. His friends supposed that his hours of seclusion were occupied in general reading and study. Only when a formal announcement of the history was made in the North American Review in 1837, did even his familiar associates begin to think of him as an author.