Yes I heard Lowlands in the Brimingham Rep productio0n of a couple of years ago. I think its a folksong the toffs have heard of,

Whether its being used right - you'd have to ask someone like old Stan Huigill or Eric Illot. they used to know all about the different shanties and what jobs they were used for onboard.

Someone like Brynn Terfel would do Lowlands nicely. I love the Corries version. Sort of lugubrious. the same way all these operatic types do Shenendoah.

As to Treasure Island I've started discussing it on facebook.