According to his memorial tile,
JOHN CLINTON AGED 10 WHO WAS DROWNED NEAR LONDON BRIDGE IN TRYING TO SAVE A COMPANION YOUNGER THAN HIMSELF, JULY 16 1894.
However, a much fuller account of his life is given in a collection of inspirational stories, F J Cross's Beneath the Banner (1895). Supporting details are given in the full version such as dates and addresses, and the author lists his source as the Rev Arthur W Jephson, Vicar of St John's, Walworth. Nonetheless, John's life history involves so many heroic acts in its too-brief ten year span that one's credibility is strained.
The book tells how John was born on 17 January 1884 in Greek Street, Soho, and his family soon moved to Lambeth. The accident which killed him was not the first misfortune to befall him: playing in the street when he was six, a heavy metal gate fell on him. He was not expected to survive his head injuries, or to do so only with severe brain damage, but thanks to the care he received in St Thomas's hospital he recovered fully except for a scar.
There then followed a first daring rescue: when he was 9, John saw a much younger child about to be run over by a hansom cab. He dashed forward and pushed the child out of the way, risking himself in the process (just the sort of rescue that would have got him into Postman's Park had he not survived). Unfortunately, the child's older brother didn't realize what had happened and thumped him in the face for pushing his sibling! (He did apologize later).
Rescue number two and dramatic incident number three occurred that same year when John was home minding the baby. When he left the room for a moment, the baby set itself on fire. Luckily, John was a boy of action once more: he rolled the baby on the floor to put the fire out, before pulling down the curtains which had also caught alight and beating out the flames with his hands.
There was then another move, to Walworth, shortly before John's death. On 16 July 1894, he and a friend went out after tea to play on the Thames foreshore near London Bridge. His friend, Campbell Mortimer, got out of his depth when paddling and was swept out into the river. John jumped in after him and brought him to shore, but was himself swept away and carried under the pier. By the time rescuers found him, he was dead. After his funeral, he was buried in a common grave at Manor Park Cemetery.
Beneath the Banner, which includes the stories of John Clinton and Alice Ayres as well as many better-known heroes, is available from Project Gutenberg.