Corrected entry: In the scene when Robin is trying to cross the river, and the Little John's men pull the rope to tip him in, Will Scarlet starts to sing "Pop Goes the Weasel" with different lyrics. The film takes place around 1200 and this song was published in 1855.
António Ferreira Costa
6th Jul 2015
Correction: The LYRICS are from the 1850's, the MUSIC (which is all Will uses) is older. We don't know exactly how old. It was described as "an Old English Dance" on a sheet of music dating back to 1853, and that's just when it was written down, not the first time anybody ever put those notes together.
Phixius ★