Origins of the phrase "Stalking Horse"

Factual Questions
1

Does anyone know the origins of the phrase “stalking horse”.

It usually used in the context of buying or bidding for an item, the stalking horse bidder being the first bidder.

Any help with the origins of the saying?

Help!

2

Try this:
http://www.bartleby.com/81/15829.html

For others, try typing “stalking horse” in google.

3

Thanks!

Excellent resource!