Thank You so much! That was the difference. I'd already turned the circular plate but it was the jumping off the cart that was my sticking point.
Thank so much again.



> Ah, I think I know where you lost it.
>
> First off, make absolutely sure the barrier past the side track is down. It'll require using the circular plate found just west of the southwest yellow room, and THEN ramming the barrier with the cart.
>
> Once the barrier's down, DON'T take the train down the side track; you want it to keep moving. Instead, you should be able to jump DOWN off the track to the path below before the side track appears. (This way, the cart will keep moving without any barriers in its way.)
>
> (I don't know what's with the ledge to the east; I know there's a too-high ledge after you catch the cart at the end, but I can't remember that on the way to the caverns...)
>
> Hope this makes sense.
>
> -Mandi