Thompson's ashes were scattered by fireworks shot from a cannon

"No More Games. No More Bombs. No More Walking. No More Fun. No More Swimming. 67," it read.

"That is 17 years past 50. 17 more than I needed or wanted. Boring. I am always bitchy. No Fun - for anybody. 67.

"You are getting Greedy. Act your old age. Relax - This won't hurt." Thompson was a longtime Rolling Stone writer.

He shot himself at home in Aspen, Colorado, on 20 February after weeks of pain from physical problems including a broken leg and a hip replacement.

The note's title, Football Season Is Over, was written in black marker pen.

'Doldrums time'

"February was always the cruellest month for Hunter S Thompson," Douglas Brinkley, presidential historian and Thompson's official biographer, wrote in Rolling Stone.

"An avid NFL fan, Hunter traditionally embraced the Super Bowl in January as the high-water mark of his year. February, by contrast, was doldrums time."

Thompson pioneered "gonzo journalism", a factual style in which the writer was an essential part of the story, and was an acute observer of American life.

He is best-known for his 1972 account of a drug-addled Nevada trip, Fear and Loathing in Las Vegas.

Last month, his ashes were scattered by fireworks shot from a cannon. Actor Johnny Depp, who played Thompson in a film version of Fear and Loathing in Las Vegas, paid for the cannon.