Found the following hamletworks.org entries referring to line 291

View Commentary Note for 229
229 Then is the throne of Denmarke to thy father,1.2.49

View Commentary Note for 291
291 You are the most imediate to our throne,1.2.109

View Immaterial Textual Note for 291
291 You are the most imediate to our throne,1.2.109

View Material Textual Note for 291
291 You are the most imediate to our throne,1.2.109

View Commentary Note for 294
294 Doe I impart {toward you for} <towards you. For> your intent1.2.112