Found the following hamletworks.org entries referring to line 2577+6

View Commentary Note for 2577+6
2577+6 {Hoist with his owne petar, an't shall goe hard}3.4.208

View Immaterial Textual Note for 2577+6
2577+6 {Hoist with his owne petar, an't shall goe hard}3.4.208

View Material Textual Note for 2577+6
2577+6 {Hoist with his owne petar, an't shall goe hard}3.4.208