Thanks Meursault. I actually did get 21 - not sure why I wrote that. So is 'r' commonly used for 'take' and is that a reference to 'heartache'? Also I don't get 18 still - why does 'nothings replaced before' mean swap O for A? I get the O, but not the A - A="before"?
Thanks for the insight also into the Ostmen. I was after the Swiss cheese plant to be honest, but it was very interesting all the same ha ha.
16 I'm still not quite there. 'Murrays Fearsome' refers to which answer? I feel like that's a stupid question but my brain is rather tired, sorry.