From John Playford’s "The Dancing Master" (1651), where it appears under the title "Argeres, or The Wedding Night". This came to me through a session tunebook that I found, though.
IMSLP has Playford’s book: http://imslp.org/wiki/The_Dancing_Master_%28Playford,_John%29
There is a discussion regarding the title on another board:
They speculate that the title is a corruption of "Algiers."
Also recorded by Mike Oldfield with Leslie Penning on recorder .Available on the remastered Ommadawn CD
Got bored and decided to transcribe the Mike Oldfield version that Keith DW posted. The recording is about a quarter step sharp. This is how I do the chords, but it might take a bit of tweaking:
(Parenthesis indicates the note is optional. Just mute that string if you don’t use it.)
Am7: x-0-2-0-1-0 //OR// x-0-5-5-5-0