He went to catch a dickey bird,
And thought he could not fail,
Because he’d got a little salt
To put upon its tail.

Childhood memory: I can remember seeing a line drawing on a drum of Saxa salt, showing a boy joyfully running after a bird and pouring salt on its tail from a salt celler. I was young enough that I had to have it explained to me that this illustrated their tagline "free running".