Earlier post than usual in the cycle here, but I'm absolutely flummoxed about the top north end. Everything else seems ok, got three obvious groups, but can't figure out 1-2, 1-4 and 10-5 at all and it's bugging me.
Thought I'd figured out how the two longer ones up there fit in but either apparently not or I'm absolutely stumped.
Any pointers on those three much obliged, even if it may reveal a massive oversight :^)