Found the following hamletworks.org entries referring to line 766

View Commentary Note for 708
708 If thou did'st euer thy deare father loue.1.5.23

View Commentary Note for 710
710 Ghost. Reuenge his foule, and most vnnaturall murther.1.5.25

View Commentary Note for 765
765 O horrible, ô horrible, most horrible.1.5.80

View Commentary Note for 766
766 If thou hast nature in thee beare it not,1.5.81

View Immaterial Textual Note for 766
766 If thou hast nature in thee beare it not,1.5.81

View Material Textual Note for 766
766 If thou hast nature in thee beare it not,1.5.81