Found the following hamletworks.org entries referring to line 551
View Commentary Note for 549
549
Laer. Farwell Ophelia, and remember well
1.3.84
View Commentary Note for 551
551
Ophe. Tis in my memory lockt
1.3.85
View Immaterial Textual Note for 551
551
Ophe. Tis in my memory lockt
1.3.85
View Material Textual Note for 551
551
Ophe. Tis in my memory lockt
1.3.85