Found the following hamletworks.org entries referring to line 1821

View Commentary Note for 1821-22
1821 Was not like madnes, there's something in his soule3.1.164
1822 Ore which his melancholy sits on brood,3.1.165

View Material Textual Note for 1821-22
1821 Was not like madnes, there's something in his soule3.1.164
1822 Ore which his melancholy sits on brood,3.1.165