Found the following hamletworks.org entries referring to line 299
View Commentary Note for 244
244
But now my Cosin Hamlet, and my sonne.
1.2.64
View Commentary Note for 294
294
Doe I impart
{toward you for}
<towards you. For>
your intent
1.2.112
View Commentary Note for 299
299
Our chiefest courtier, cosin, and our sonne.
1.2.117