This may not be a complete list of all calls authored by Jim Robertson.
Sink The Boat
Jay King - page 148
From facing lines: Centers Pass Thru, Partner Trade and Pass Thru. Meanwhile ends move around the outside, passing two dancers and then doing a Pass Out with the third. Finishes in a square set with couples facing out.
Jim Robertson 1967
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.