Found the following hamletworks.org entries referring to line 3391-2

View Commentary Note for 3390-91
3390-1 Ham. To what base vses wee may returne Horatio ? | Why may not 3390-1 

View Material Textual Note for 3390-91
3390-1 Ham. To what base vses wee may returne Horatio ? | Why may not 3390-1 

View Commentary Note for 3391-92
3391-2 imagination trace the noble dust of Al|exander, till a find it stopping 
3392 a bunghole?5.1.204

View Material Textual Note for 3391-92
3391-2 imagination trace the noble dust of Al|exander, till a find it stopping 
3392 a bunghole?5.1.204