It boggles the mind! Perhaps they slept sitting up anyway? I'm sure I read somewhere that until relatively recently that was quite common because people believed it aided the digestion ....

Anyway, I was talking to some friends about Bounty afterwards and we came to the conclusion that sharing bunks/hammocks must have been part of it - one watch in and one watch out, so to speak. (I believe that happens on some modern submarines.) It would still be terribly cramped by our standards, though :-( No wonder they coined the term 'cabin fever'.