Found the following hamletworks.org entries referring to line 2221-2

View Commentary Note for 2221-22
2221-2 Ham. I do not wel vnderstand that, wil you play | vpon this pipe? 2221 

View Immaterial Textual Note for 2221-22
2221-2 Ham. I do not wel vnderstand that, wil you play | vpon this pipe? 2221 

View Material Textual Note for 2221-22
2221-2 Ham. I do not wel vnderstand that, wil you play | vpon this pipe? 2221