Found the following hamletworks.org entries referring to line 2539-40

View Commentary Note for 2539-40
2539-40 {Ger.}<Qu.> O Hamlet | thou hast cleft my hart in twaine. 

View Immaterial Textual Note for 2539-40
2539-40 {Ger.}<Qu.> O Hamlet | thou hast cleft my hart in twaine. 

View Material Textual Note for 2539-40
2539-40 {Ger.}<Qu.> O Hamlet | thou hast cleft my hart in twaine.