"A slave that's not a twentieth part the tithe."
"Enter Ghost in his night-gown."
I have given this stage-direction from the 4to 1603, as it is quite incongruous to suppose that the Ghost appeared in armour in a room of the palace; and as Hamlet says, "My father in his habit as he lived!" As the Ghost makes but one short speech, I think, if it could be so managed, it would be more psychologic and effective for him to remain invisible, except to Hamlet mentally, and his voice only be heard by the audience.
"Lest with this piteous action you convert
My stern effects."
I read, with Singer, affects. See on Meas. for Meas. iii. 1.