Found the following hamletworks.org entries referring to line 276

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

View Commentary Note for 276
276 Of impious stubbornes, tis vnmanly griefe,1.2.94

View Immaterial Textual Note for 276
276 Of impious stubbornes, tis vnmanly griefe,1.2.94

View Material Textual Note for 276
276 Of impious stubbornes, tis vnmanly griefe,1.2.94