Gothick Northamptonshire by Jack Gould says of Pitsford:
Within living memory, on May Day there were chosen not only a May Queen and King but a mysterious figure called 'Jack in the Green'.
A boy wore a cane construction about 4 feet ... high with leather straps inside to fit over his shoulders. This was made by a blind man in the village and covered by branches of laurel, barberry and other evergreens. It was possibly a reminder of the Elizabethan 'man in the oak'.Gould goes on to say that the Jack in the Green should not be confused with the Green Men you find in churches, but other sources do connect them.
Anyway, I looked for the Jack in the Green in Pitsford yesterday, but I'm not sure I found him.