Hmmm... maybe the secret is having three shells. I tried with just one and all he would say was that wasn't enough. I will have to try with three and see what happens!
Thanks for the info everyone!
BLKCat
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...Events are cowards: they don't occur singly, but instead they run in packs and leap out at you all at once.
(Excerpt from "Neverwhere", by Neil Gaiman)