At this time Jones was living at Cotchford Farm in East Sussex, the residence formerly owned by Winnie-the-Pooh author A. A. Milne which Jones had purchased in November 1968. There is uncertainty as to the mental and physical state Jones was in. The last known photographs, taken by schoolgirl Helen Spittal on 23 June 1969, shortly after his departure from the Stones, are not flattering; Jones appears bloated, with deep-set eyes. People who visited (particularly Alexis Korner) were surprised, however, by Jones's state in late June. Korner noted that Jones was "happier than he had ever been" at this time. He is known to have contacted Ian Stewart, Mitch Mitchell, Alexis Korner and Jimmy Miller about intentions to put together another band.
At around midnight on the night of 2-3 July 1969, Jones was discovered motionless at the bottom of his swimming pool at Cotchford Farm. His Swedish girlfriend, Anna Wohlin, is convinced he was alive when they took him out, insisting he still had a pulse. However, by the time the doctors arrived, it was too late, and he was pronounced dead. The coroner's report stated "Death by misadventure", and noted his liver and heart were heavily enlarged by drug and alcohol abuse. He was 27 years old.