Found the following hamletworks.org entries referring to line 275

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

View Commentary Note for 275
275 In obstinate condolement, is a course 1.2.93

View Immaterial Textual Note for 275
275 In obstinate condolement, is a course 1.2.93

View Material Textual Note for 275
275 In obstinate condolement, is a course 1.2.93