This may not be a complete list of all calls authored by Jerry Murray.
Jam The Lock
Jay King - page 151
From a wave or two faced line: Centers Single Hinge then spread and move up a quarter. Original ends do an individual Half Tag then Single Hinge (ends can slide together and Trade to accomplish the same thing). A wave finishes as a wave and a two faced line as a two faced line.
Jerry Murray 1975
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.