Possible Clues:

• Adventure novel of 1887
• Noted seashore vendor
• __/her pronouns
• 'Thar ___ blows!'
• Seashell seller, in a tongue twister
• Feminine subject
• Seashell seller of rhyme
• "Murder, ___ Wrote"
• Cyndi Lauper's "— Bop"
• That vessel