Found the following hamletworks.org entries referring to line 2
View Commentary Note for 27
27
Bar. Say, what is Horatio there?
1.1.19
View Immaterial Textual Note for 2
2
Enter Barnardo, and Francisco, two Centinels.
[Bl]
View Material Textual Note for 2
2
Enter Barnardo, and Francisco, two Centinels.
[Bl]
View Commentary Note for 35
35
Therefore I haue intreated him along,
1.1.26