Ollie ollie oxenfree

Factual Questions
1

I would really like to kow, why do we have the phrase “Ollie Ollie Oxenfree”?

2

http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=Ollie+Ollie+Oxenfree

3
4

Or, from the master:
http://www.straightdope.com/classics/a900622a.html

5

I searched the archive but I used “oxenfree” instead of “oxen go free”

6

I always heard it as the OP stated, and not, as some report,

“all the all the outs in free”.

7

Huh. When I learned it, it was “ollie ollie in come free”, and I think the “ollie” was a corruption of “all ye”. But the latter is pure speculation on my part.