QUERY: RE THE AUTHORITARIAN'S FAVORITE ORWELL QUOTE

http://www.williamgibsonbooks.com/blog/2009_07_01_archive.asp#408760482017248450

"People sleep peacefully in their beds at night only because rough men stand ready to do violence on their behalf."

Often this is given as "Good people..."

I have been unable to source this back to a specific piece of GO's prose. Have encountered the opinion that it is not an actual GO quotation.

Can anyone help? Thanks.