Found the following hamletworks.org entries referring to line 878
View Commentary Note for 875
875
That you knowe ought of me, this
{doe sweare,}
<not to doe:>
1.5.
View Commentary Note for 878
878
Ghost. Sweare.
1.5.181
View Immaterial Textual Note for 878
878
Ghost. Sweare.
1.5.181
View Material Textual Note for 878
878
Ghost. Sweare.
1.5.181
View Immaterial Textual Note for 879
879
Ham. Rest, rest, perturbed spirit: so Gentlemen,
1.5.182