Found the following hamletworks.org entries referring to line 1248-51

View Commentary Note for 1247-8
1247-8 Pol. Indeede that's out of the ayre; | how pregnant sometimes 

View Material Textual Note for 1247-8
1247-8 Pol. Indeede that's out of the ayre; | how pregnant sometimes 

View Commentary Note for 1248-51
1248-51 his replies are, | a happines | that often madnesse hits on, | which reason 

View Material Textual Note for 1248-51
1248-51 his replies are, | a happines | that often madnesse hits on, | which reason