Stuck -- after Gunnar's box

[catsandbooks]

I am pretty sure you should have done the sounding depth numbers by now. You can't find the puzzle in the hold yet.

[kdoodle411]

Utterly stuck. I just helped Gunnar to grab his box, but it doesn't seem like there's anything else I can do. Here's what's on my task list:

- Find Dagny - Sketches - Music box - Sound depth numbers - Lock in cupboard - Tumi's chew toy

I know there's should be a puzzle in the hold with a mechanical contraption... am I blind should I have found it already? Could use some help :) Thanks!