Found the following hamletworks.org entries referring to line 1222-3

View Commentary Note for 1222-4
1222-3 Ham. Let her not walke i'th Sunne, conception is a | blessing, 
1223-4 But <not> as your daughter may conceaue, friend | looke to't. 

View Material Textual Note for 1222-4
1222-3 Ham. Let her not walke i'th Sunne, conception is a | blessing, 
1223-4 But <not> as your daughter may conceaue, friend | looke to't.