In the 5 April 1890 issue of Vanity Fair magazine, he was caricatured by 'FCG'. This was the accompanying text:

It is only five-and-thirty years -- not five-and-forty, as most people believe -- since he was born at Hendon, where he rapidly developed much muscle and waxed exceedingly. Before he was eighteen years old he became quite well known in the athletic world. He rowed his first race on the River Lea eighteen years ago, and he has since won the Thames Cup and the Grand Challenge for the Thames Rowing Club; he devoted a space to running, and won pots at the London Athletic Club and at other meetings; and he became, and for long remained, a force among Rugby Unionists, and, playing for the Wasps’ Football team, used to throw opposing footballers about as a child throws tin soldiers. But having now become a popular member of the Stock Exchange and altogether a big man, he has put away childish things and has grown grey and staid. Yet he is still identified with every branch of athletic exercise, and much honoured in the observance thereof.

He has boxed many people with vigour, and is still quite a hard man to mark. And though he is now more bulky and less easily moved than he was, yet, being an honourable man, he is everywhere accepted as the fairest and best possible judge of other people’s performances with their fists. Consequently he is generally wanted when there is any sparring to be done. A practised swordsman, he is otherwise extremely well able to take care of himself, as frequenters of Angelo’s -- where he is often seen to illustrate the uses of both the small sword and the sabre -- well know. He is something of a seaman, for he holds a Board of Trade certificate of competency; and he has been a prominent member of the Corinthian Yacht Club. He has been seen with a gun; but he does not always hold it straight when it goes off.

Everyone likes “Jack,” in the box or out of it.