Okay, you have the yukka leaves, I see. Why don't you see if there's anyone who needs those?If that doesn't help, consider this:

What are the properties of the leaves, and who have you met who might want the leaves? Once you accomplish that task, it will lead to a series of tasks that will end with you getting th ejeweled dagger, and in the process answering the rest of your questions.

I do have a map of the gardens that I made myself, but I promise it's really no that hard to map out. just remember that at the north end, going west takes you in a circle, and in a couple of other areas, you go in a circle. Just ignore those sections, and map out the rest of it, I promise it's easy.

Rift "In baseball, I play left bench" Traveler