Found the following hamletworks.org entries referring to line 845

View Commentary Note for 838
838 Booth. My Lord we will not.1.5.145

View Commentary Note for 843
843 Mar. We haue sworne my Lord already.1.5.147

View Commentary Note for 844
844 Ham. Indeede vppon my sword, indeed.1.5.148

View Material Textual Note for 844
844 Ham. Indeede vppon my sword, indeed.1.5.148

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 Immaterial Textual Note for 845
845 {Ghost cries vnder the Stage.}1.5.149
845 Ghost. Sweare. <Ghost cries vnder the Stage.>

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

View Immaterial Textual Note for 846
846-7 Ham. {Ha,} <Ah> ha, boy, say'st thou so, art thou there {trupenny} <true- |penny>? 

View Material Textual Note for 847
847 Come {on,} <one> you heare this fellowe in the Sellerige,1.5.151

View Material Textual Note for 848
848 Consent to sweare.1.5.152

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

View Commentary Note for 859
859 Ham. Well sayd olde Mole, can'st worke {it'h earth} <i'th' ground> so fast,1.5.162