Found the following hamletworks.org entries referring to line 3822

View Commentary Note for 3820, etc.
3820 Had I but time, as this fell sergeant Death 38205.2.336
3821 Is strict in his arrest, ô I could tell you, 
3822 But let it be; Horatio I am dead,5.2.338

View Immaterial Textual Note for 3820, etc.
3820 Had I but time, as this fell sergeant Death 38205.2.336
3821 Is strict in his arrest, ô I could tell you, 
3822 But let it be; Horatio I am dead,5.2.338

View Material Textual Note for 3820, etc.
3820 Had I but time, as this fell sergeant Death 38205.2.336
3821 Is strict in his arrest, ô I could tell you, 
3822 But let it be; Horatio I am dead,5.2.338