Ah - now I call that 'the run ashore' - but as usual I have no idea where I heard it. Not on vinyl.

As a stick and rag sailor myself, I would find it difficult to sing something I could not make sense of.

Staysails are any triangular sail hoisted on a stay - a wire or rope - rather than a spar or boom. Foresheets are the ropes at the foot of a fore sail - which could be a jib which is a staysail - but how to 'lay in' either of them I have no idea.