In his manners he had something of the stiffness of the Quaker remaining, and, though he never said or did a rude thing, he never made use of any of the forms of politeness. Not that he avoided them through affectation; his behaviour was natural, without timidity, and easy without boldness. He rarely associated with the young men of the College, who called him, with a mixture of derision and respect, ‘Phenomenon Young,’ but he lived on familiar terms with the Fellows in the Common Room. He had few friends of his own age or pursuits in the University, and not having been introduced to many of those who were distinguished either by their situation or talent, he did not seek their society, nor did they seek him; they did not like to admit the superiority of anyone in _statu pupillari_, and he would not converse with anyone but as an equal. It is difficult to say how he employed himself; he read little, and though he had access to the College and University libraries he was seldom seen in them. There were no books piled on his floor, no papers scattered on his table, and his room had all the appearance of belonging to an idle man. I once found him blowing smoke through long tubes, and I afterwards saw a representation of the effect in the ‘Transactions of the Royal Society,’ to illustrate one of his papers upon sound; but he was not in the habit of making experiments. He walked little and rode less; but, having learnt to ride the great horse abroad, he used to _pace_ round Parker’s Piece on a hackney: he once made an attempt to follow the hounds, but a severe fall prevented any future exhibition. He seldom gave an opinion, and never volunteered one. He never laid down the law like other learned doctors, or uttered apophthegms or sayings to be remembered. Indeed, like most mathematicians (though we hear of abstract mathematics), he never seemed to think abstractedly. A philosophical fact, a difficult calculation, an ingenious instrument, or a new invention, would engage his attention; but he never spoke of morals, of metaphysics, or of religion. Of the last I never heard him say a word, nothing in favour of any sect, or in opposition to any doctrine; at the same time, no sceptical doubt, no loose assertion, no idle scoff, ever escaped him.