Found the following hamletworks.org entries referring to line 283

View Immaterial Textual Note for 271
271 But you must knowe your father lost a father,1.2.89

View Commentary Note for 280
280 For what we knowe must be, and is as common 1.2.98

View Commentary Note for 283
283 Take it to hart, fie, tis a fault to heauen,1.2.101

View Immaterial Textual Note for 283
283 Take it to hart, fie, tis a fault to heauen,1.2.101

View Material Textual Note for 283
283 Take it to hart, fie, tis a fault to heauen,1.2.101