Related tune: "Come Ashore Jolly Tar".  If you compare the (untitled) tune printed in Book 7 to “Jacky Tar“ from *Kerr's*, you can see that this is recognisably the same tune but the parts are in a
different order and there are variations in the RSCDS book that aren't in *Kerr's*. This whole situation probably needs careful revision.  (information supplied by Anselm Lingnau, 2015-08-27.)