"Now he is for the numbers that Petrarch flowed in. Laura to his lady was but a kitchen-wench—marry, she had a better love to berhyme her—Dido a dowdy, Cleopatra a gypsy, Helen and Hero hildings and harlots, Thisbe a grey or so, but not to the purpose. "(2.4.)
This quote contains several allusions. Petrarch was an Italian Renaissance poet. The six women named—Laura, Dido, Cleopatra, Helen, Hero, and Thisbe—were historical or mythological women who were the subjects of Shakespeare’s or others’ love poetry.