Found the following hamletworks.org entries referring to line 852

View Commentary Note for 845
845 {Ghost cries vnder the Stage.}1.5.149
845 Ghost. Sweare. <Ghost cries vnder the Stage.>1.5.149

View Material Textual Note for 851
851 Sweare by my sword.1.5.154

View Commentary Note for 852
852 Ghost. Sweare.1.5.155

View Immaterial Textual Note for 852
852 Ghost. Sweare.1.5.155

View Material Textual Note for 852
852 Ghost. Sweare.1.5.155

View Material Textual Note for 853
853 Ham. Hic, & vbique, then weele shift {our} <for> ground:1.5.156