How many quartos of Romeo and Juliet were produced?
Romeo and Juliet appeared in five Quarto editions, the first printed in 1597 and the last in 1637. The First Folio of 1623 was based on Q3 (1609) and Q4 (1622).
How old is Juliet?
Juliet is thirteen years old. In Shakespeare's primary sources, Juliet is considerably older than she is in the play. Why does Shakespeare change Juliet's age? Professor Gayle Whittier offers this explanation: "Juliet's very age suggests that she both represents and defeats a translation of sonnet into flesh. At 'almost' fourteen (and not sixteen, as in Brooke's earlier "Romeus and Juliet"), she has years almost equal to the completed form of the sonnet's fourteen-lined body."
("The Sonnet's Body and the Body Sonnetized in Romeo and Juliet", in "Critical Essays on Romeo and Juliet", Joseph Porter, ed., 63)
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