Found the following hamletworks.org entries referring to line 639

View Commentary Note for 636
636 To cast thee vp againe? what may this meane1.4.51

View Commentary Note for 639
639 Making night hideous, and we fooles of nature1.4.54

View Immaterial Textual Note for 639
639 Making night hideous, and we fooles of nature1.4.54

View Material Textual Note for 639
639 Making night hideous, and we fooles of nature1.4.54