These things are always hard as hell and endlessly frustrating.
Still, I know a lot of you came here from ToS, so I invite you to join me in the struggle of being lost on random riddles for hours with no way to talk to anybody about it!
http://www.blankmediagames.com/phpbb/viewtopic.php?f=3&t=94289
Even if you’re not from ToS, I recommend participating - the riddles they think up can be hellishly difficult. As this is the last one, definitely go give it a try!