Found the following hamletworks.org entries referring to line 2489

View Commentary Note for 2489
2489 Th'important acting of your dread command, ô say.3.4.109

View Immaterial Textual Note for 2489
2489 Th'important acting of your dread command, ô say.3.4.109

View Material Textual Note for 2489
2489 Th'important acting of your dread command, ô say.3.4.109