There were gentlemen and there were seamen in the navy of Charles the Second. But the seamen were not gentlemen: and the gentlemen were not seamen.

The bower we shrined to Tennyson, / Gentlemen, / Is roof-wrecked; damps there drip upon / Sagged seats, the creeper-nails are rust,/ The spider is sole denizen.

Where once we danced, where once we sang, Gentlemen, / The floors are shrunken, cobwebs hang.

Where lies the land, to which the ship would go?Far, far ahead is all, her seamen know.And where the land she travels from?Away, far far behind, is all that they can say.

It's unclear on which ship (Hickok) died. There were seamen who were killed on shore, in attacks, or he could have been between ships.

Scrimshaw on cow horns is only common in Australia, and in the Wild West. It usually involved ex-seamen who had learnt their skills carving whale bones, then ended up on the land.