Richie, Brian - re 'mystery text'.

I think the "e" might refer to Child's E version from Motherwell mss, which has the same refrain lines (in fact almost identical 1st verse):

The Elfin Knight sits on yon hill
Ba ba lilly ba
Blowing his horn loud and shill
And the wind has blawn my plaid awa.

The word could be Esquire, but I'm not sure, and don't know what it means if it is.

Mick