Found the following hamletworks.org entries referring to line 277

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

View Commentary Note for 277
277 It showes a will most incorrect to heauen1.2.95

View Immaterial Textual Note for 277
277 It showes a will most incorrect to heauen1.2.95

View Material Textual Note for 277
277 It showes a will most incorrect to heauen1.2.95