Found the following hamletworks.org entries referring to line 306

View Commentary Note for 304
304 King. Why tis a louing and a faire reply,1.2.121

View Commentary Note for 306
306 This gentle and vnforc'd accord of Hamlet1.2.123

View Immaterial Textual Note for 306
306 This gentle and vnforc'd accord of Hamlet1.2.123

View Material Textual Note for 306
306 This gentle and vnforc'd accord of Hamlet1.2.123