Read the lines, spoken by Bernardo to Horatio, from Act I, scene i of Hamlet.

Last night of all,
When yond same star that's westward from the pole
Had made his course to illume that part of heaven
Where now it burns, Marcellus and myself,
The bell then beating one,—....

What is the purpose of these lines?

to describe the time of night
to explain the progress of a star
to foreshadow the appearance of the ghost
to convince Horatio of the existence of ghosts


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