Of Cook's private life during his brief intervals at home we know nothing. A man rising from the ranks, and of his reserved character, would have but few friends, when he had such short time to make them in his new sphere. He lived at Mile End when at home, but after his death his widow removed to Clapham, living there for forty years, at first with her cousin, Isaac Smith, who had served with Cook in the Endeavour and Resolution. She died in 1835, at the great age of ninety-three.

Of Cook's character, none could be a better judge than Captain King, who writes as follows, after describing his death:--

"Thus fell our great and excellent commander. After a life of so much distinguished and successful enterprise, his death, as far as regards himself, cannot be considered premature, since he lived to finish the great work for which he seems to have been designed. How sincerely his loss was felt and lamented, by those who had so long found their general security in his skill and conduct, and every consolation in their hardships in his tenderness and humanity, it is neither necessary nor possible for me to describe. The constitution of his body was robust, inured to labour, and capable of undergoing the severest hardships. His stomach bore without difficulty the coarsest and most ungrateful food. Indeed, temperance with him was scarcely a virtue, so great was the indifference with which he submitted to every kind of self-denial. The qualities of his mind were of the same hardy, vigorous kind with those of his body. His understanding was strong and perspicacious. His judgment in whatever related to the service he was engaged in quick and sure. His designs were bold and manly, and both in the conception and in the mode of execution bore evident marks of a great original genius. His courage was cool and determined, and accompanied by an admirable presence of mind in the moment of danger. His manners were plain and unaffected. His temper might, perhaps, have been justly blamed as subject to haughtiness and passion, had not these been disarmed by a disposition the most benevolent and humane. Those intervals of recreation, which sometimes unavoidably occurred, and were looked for by us with a longing that persons who have experienced the fatigues of service will readily excuse, were submitted to by him with a certain impatience whenever they could not be employed in making further provision for the more effectual prosecution of his designs."

This is a pretty complete picture, and of a great man; a man who had before him continually his duty, and who had in an eminent degree the capacity to carry it out.