It appears that the Hal-an-tow/Heel and Toe may have been more widespread than Cornwall.

• In the English Midlands it is commonly believed that the first verse may refer to the Abbot's Bromley (Staffordshire) Horn Dance (which takes place in September!!).
• In John Graham's "Shakespearean Bidford Morris Dances", collected in Warwickshire, the dance to the tune of Monk's March is actually called "Heel and Toe."
• And where did Shakespeare (who was a Warwickshire lad) get this from ...

As You Like It, Act IV, Scene 2

What shall he have, that killed the deer?
His leather skin, and horns to wear.
   Then sing him home.
Take thou no scorn, to wear the horn;
It was a crest ere thou wast born.
   Thy father's father wore it,
   And thy father bore it.
The horn, the horn, the lusty horn,
Is not a thing to laugh to scorn.