The letters which he wrote home give us some pleasant glimpses of his College life, which he evidently thoroughly enjoyed. For the first time in his life he had access to a good library—that of Trinity College—and he speaks of ‘an inconceivable desire to read all manner of books at once,’ adding that at that very moment there were two folios and six quartos of different works upon his table. The success which he afterwards achieved is a proof that he entered heartily into the studies of the place; and among his friends were men who were studious then, and afterwards became eminent. Among these we may mention Mr, afterwards Sir John, Herschel, Mr Richard Jones, Mr Julius Charles Hare, and Mr Charles Babbage. A correspondent of his, writing so late as 1841, recalls the ‘Sunday morning philosophical breakfasts,’ at which they used to meet in 1815; and there are indications in the letters of similar feasts of reason and flows of soul. It must, on the other hand, be admitted that a few indications of an opposite character may be produced. He admits, in a half-bantering, half-serious way, that he had laid himself open to the charge of idleness; and he describes the diversions of himself and his friends during the long vacation of 1815 as ‘dancing at country fairs, playing billiards, tuning beakers into musical glasses,’ and the like. It need be no matter of surprise that a young man of high spirits and strong bodily frame, brought up in the seclusion of Lancashire, should have taken the fullest advantage of the first opportunity which presented itself of appreciating the lighter and brighter side of existence. This, however, was all. Whewell knew perfectly well where to stop. No scandal ever attached itself to his name; and he ‘wore the white flower of a blameless life’ through a period when the customs prevalent in the University were such as are more honoured in the breach than in the observance.

He proceeded to the degree of Bachelor of Arts in 1816, when he was second Wrangler and second Smith’s Prize-man. On both occasions he was beaten by a Mr Jacob, of Caius College, who was his junior by two years. It is a Cambridge tradition that Mr Jacob’s success was a surprise to everybody, for he had intentionally affected to be an idle man, and showed himself on most days riding out in hunting costume, the truth being that he kept his books at a farm-house, where he pursued his studies in secrecy and quiet. He was a young man of the greatest promise; and it was expected that he would achieve a conspicuous success at the Bar. But his lungs were affected, and he died of consumption at an early age. As Mr Todhunter remarks, his fame rests mainly on the fact that he twice outstripped so formidable a competitor as the future Master of Trinity. Whewell mentions him as ‘a very pleasant as well as a very clever man,’ and adds, ‘I had as soon be beaten by him as by anybody else.’

The labours of reading for the degree over, Whewell had leisure to turn his studies in any direction whither his fancy led him. No doubt he fully appreciated the, to him, unusual position, for he tells his sister that few people could be ‘more tranquilly happy than your brother, in his green plaid dressing-gown, blue morocco slippers, and with a large book before him.’ The time had come, however, when he was to experience the first of the inevitable inconveniences of a College life. Two of his most intimate friends, Herschel and Jones, left Cambridge, and he bitterly deplores their loss. Indeed it probably needed all the attachment to the place, which he proclaims in the same letter, to prevent his following their example. He appears at one time to have thought seriously of going to the Bar. He began, however, to take pupils: an occupation which becomes a singularly absorbing one, especially when the tutor takes the interest in them which apparently he did. One of those with whom he spent the summer of 1818, in Wales, Mr Kenelm Digby, afterwards author of the Broadstone of Honour, who admits that he was so idle that his tutor would take no remuneration from him, has recorded that—

‘I had reason to regard Whewell as one of the most generous, open-hearted, disinterested, and noble-minded men that I ever knew. I remember circumstances that called for the exercise of each of those rare qualities, when they were met in a way that would now seem incredible, so fast does the world seem moving away from all ancient standards of goodness and moral grandeur.’

This testimony is important, if only for comparison with the far different feelings with which his more official pupils regarded him in after years. In these occupations he spent the two years succeeding his degree; for the amount of special work done for the Fellowship Examination was probably not great. He was elected Fellow in October 1817; and in the summer of the following year was made one of the assistant-tutors. With this appointment the first part of his University career ends, and the second begins.

His connexion with the educational staff of Trinity College, first as assistant-tutor, then as sole tutor, lasted for just twenty years. These were the most occupied of his busy life; and in justification of what we said at the outset of the multifarious nature of his occupations, we proceed to give a rapid chronological sketch of them. His career as an author began, in 1819, with an Elementary Treatise on Mechanics. It went through seven editions, in each of which, as Mr Todhunter says, ‘the subject was revolutionized rather than modified; and the preface to each expounded with characteristic energy the paramount merits of the last constitution framed.’ The value of the work was greatly impaired by these proceedings, for an author can hardly expect to retain the unwavering confidence of his readers while his own opinions are in constant fluctuation. In 1820 he was Moderator, and travelled abroad for the first time. In 1821 he was working at geology seriously, and took a geological tour in the Isle of Wight with Sedgwick, who had been made Woodwardian Professor three years before. Later in the year he explored the Lake Country, and was introduced to Mr Wordsworth. Their acquaintance subsequently ripened into a friendship, which appears in numerous letters, and notably in the dedication prefixed to the Elements of Morality. A Treatise on Dynamics was published in 1823, which was treated in much the same fashion as its fellow on Mechanics. The summer vacation was spent in a visit to Paris for the first time, and an architectural tour in Normandy with Mr Kenelm Digby. In 1824 he took a prominent part in the resistance to the Heads of Colleges in their attempt to nominate to the Professorship of Mineralogy; and later in the year he went again to Cumberland with Sedgwick, ‘rambling about the country, and examining the strata’; visiting Southey and Wordsworth; and, in the intervals of geology, seeing cathedrals and churches. In 1825, as the chair of Mineralogy was about to be vacated by Professor Henslow, promoted to that of Botany, Whewell announced himself a candidate; and by way of preparation spent three months in Germany, studying crystallography at the feet of Professor Mohs, of Freiburg: a subject on which he had already made communications to the Royal Society and to the Cambridge Philosophical Society. This was his first introduction to Germany, in whose language and literature he thenceforward took the greatest interest. He even modified his way of writing English in accordance with German custom, as is shown by the plentiful scattering of capitals through his sentences, and by a certain ponderosity of style which savours of German originals. The dissensions as to the mode of election to the Mineralogical chair caused it to remain vacant for three years; so that Whewell, about the choice of whom there never seems to have been any doubt, had no immediate opportunity of turning to account his newly-acquired knowledge. He therefore, with even more than characteristic energy, turned his attention to two most opposite subjects, Theology, and the Density of the Earth.

In the summer of 1826 he commenced a series of investigations on the latter subject at Dolcoath Mine, Cornwall, in conjunction with Mr Airy. The essential part of the process was to compare the time of vibration of a pendulum at the surface of the earth with the time of vibration of the same pendulum at a considerable depth below the surface. Unfortunately the experiments, which were renewed in 1828, failed to lead to any satisfactory result, partly through an error in the construction of the pendulum, partly through a singular fatality, by which, on both occasions, they were frustrated by a serious accident. The account he gives of himself, and of the way in which the researches were regarded by the Cornishmen, is too amusing not to be quoted. It is contained in a letter to his friend Lady Malcolm, and is dated ‘Underground Chamber, Dolcoath Mine, Camborne, Cornwall, June 10, 1826:

‘I venture to suppose that you never had a correspondent who at the time of writing was situated as your present one is. I am at this moment sitting in a small cavern deep in the recesses of the earth, separated by 1,200 feet of rock from the surface on which you mortals tread. I am close to a wooden partition which has been fixed here by human hands, through which I ever and anon look, by means of two telescopes, into a larger cavern. That larger den has got various strange-looking machines, illumined here and there by unseen lamps, among which is visible a clock with a face most unlike common clocks, and a brass bar which swings to and fro with a small but never-ceasing motion. I am clad in the garb of a miner, which is probably more dirty and scanty than anything you may have happened to see in the way of dress. The stillness of this subterranean solitude is interrupted by the noise, most strange to its walls, of the ticking of my clock, and the chirping of seven watches. But besides these sounds it has noises of its own which my ear catches now and then. A huge iron vessel is every quarter of an hour let down through the rock by a chain above a thousand feet long, and in its descent and ascent dashes itself against the sides of the pit with a violence and a din like thunder; and at intervals, louder and deeper still, I hear the heavy burst of an explosion when gunpowder has been used to rend the rock, which seems to pervade every part of the earth like the noise of a huge gong, and to shake the air within my prison. I have sat here for some hours, and shall sit five or six more, at the end of which time I shall climb up to the light of the sky in which you live, by about sixty ladders, which form the weary upward path from hence to your world. I ought not to omit, by way of completing the picturesque, that I have a barrel of porter close to my elbow, and a miner stretched on the granite at my feet, whose yawns at being kept here so many hours, watching my inscrutable proceedings, are most pathetic. This has been my situation and employment every day for some time, and will be so for some while longer, with the alternation of putting myself in a situation as much as possible similar, in a small hut on the surface of the earth. Is not this a curious way of spending one’s leisure time? I assure you I often think of Sir John’s favourite quotation from Leyden, “Slave of the dark and dirty mine! What vanity has brought thee here?” and sometimes doubt whether sunshine be not better than science.

‘If the object of my companion and myself had been to make a sensation, we must have been highly gratified by the impression which we have produced upon the good people in this country. There is no end to the number and oddity of their conjectures and stories about us. The most charitable of them take us to be fortune-tellers; but for the greater part we are suspected of more mischievous kinds of magic. A single loud, insulated, peal of thunder, which was heard the first Sunday after our arrival, was laid at our door; and a staff which we had occasion to plant at the top of the cliff, was reported to have the effect of sinking all unfortunate ships which sailed past.

‘I could tell you many more such histories; but I think this must be at least enough about myself, if I do not wish to make the quotation from Leyden particularly applicable.’