Found the following hamletworks.org entries referring to line 3778

View Commentary Note for 3778, etc.
3778 King. Part them, they are incenst.  
3779 Ham. Nay come againe. 
3780 Ostr. Looke to the Queene there howe. 3780 

View Immaterial Textual Note for 3778, etc.
3778 King. Part them, they are incenst.  
3779 Ham. Nay come againe. 
3780 Ostr. Looke to the Queene there howe. 3780 

View Material Textual Note for 3778, etc.
3778 King. Part them, they are incenst.  
3779 Ham. Nay come againe. 
3780 Ostr. Looke to the Queene there howe. 3780