Yes, please -- I'd like to hear more about that! I've got the poem memorized, but mostly what I know about it is that Carroll thought of the last line first --

Yes, please -- I'd like to hear more about that! I've got the poem memorized, but mostly what I know about it is that Carroll thought of the last line first -- "For the Snark _was_ a Boojum, you see." and ended up writing the other umpteen dozen verses just so that that would make sense as a punch line.