I just noticed that bits of two well-known shanties are sung the classic 1935 film of "Treasuer Island," with Wallace Beery as Long John Silver, Jackie Cooper as Jim Hawkins, and an uncredited parrot star as "Cap'n Flint."

The accompaniment of a lute-like instrument, one pirate sings as follows - in the pirate's boozin' ken:

The anchor is weighed and the sails they are set,
Goodbye, fare you well, goodbye, fare you well;
The gitls we are leaving we'll never forget,
My boys! We're homeward bound!   

Later, on board the Hispaniola, Long John converses with Jim while off-duty pirates sing,

The blackbird sang unto the crow!
Hilo, boys, hilo!
It's up aloft this yard must go! [I think]
Hilo, somebody! Hilo!

I believe they repeat the same satnza, then laugh heartily. It's all off camera.

It must be folklore 'cause it sure ain't history!