Found the following hamletworks.org entries referring to line 2404

View Commentary Note for 2404
2404 Ham. How now, a Rat, dead for a Duckat, dead.3.4.24

View Immaterial Textual Note for 2404
2404 Ham. How now, a Rat, dead for a Duckat, dead.3.4.24

View Material Textual Note for 2404
2404 Ham. How now, a Rat, dead for a Duckat, dead.3.4.24