That's not an egg, that's--
Well, nevermind. Yarrow does have a clue to help you find the egg. Your hint is: R toe2
You don't know what that means? How is that her problem. Use this clue with the clues you've got already, because this is the last clue you're getting relating to the egg! Hopefully the three pieces you've collected will help you find the egg you're looking for.
Remeber to review the instructions found here. Good luck!