Humphrey Newton sketched a few facets of Newton’s life as he found it in the 1680s.
Newton enjoyed taking a turn in his garden about which he was “very Curious … not enduring to see a weed in it…” His curiosity did not rise to the level of dirtying his hands, however; he hired a gardener to do the work.
He was careless with money; he kept a box filled with guineas, as many as a thousand, Humphrey thought, by the window. Humphrey was not sure if it was carelessness or a deliberate ploy to test the honesty of others — primarily Humphrey.
In the winter, he loved apples, and sometimes he would have a small roasted quince. Not much in the account suggested leisure, however. The Newton Humphrey found had immersed himself in unremitting study to the extent that he grudged even the time to eat and sleep.
During five years, Humphrey saw him laugh only once, and John North, master of Trinity from 1677 to 1683, feared that Newton would kill himself with study.