I’ll silence me even here.
[III, iv, 4]
In the Quarto of 1603, Corambis (Polonius) is more explicit.
Madame, I heare yong Hamlet comming,
I’le shrowde my selfe behinde the Arras.
exit Cor.
[Sig. G2r]
Earlier in the play, in preparation for a different observation, Polonius arranged with the King to observe Hamlet as
he walks four hours together
Here in the lobby....