Wow that's obscure, and I've worked on a few Hamlets.
I've never been aware of hearing it. All texts I have say tickled o' the sere, and editors say it's often cut as not understood by many...
It's in Chambers - under sear!
I believe it was called puzzle 2156, but as I said it was reprinted in the paper last week in error and called 2157 Carte Blanche.