Possible Clues:

• American author with beat, endlessly metrical
• Imaginative; like verse
• Looking back, make reference to old park - it's a bit flowery
• Quote work about to be expressed in verse
• Quote work both contrary and lyrical
• Imaginative American writer leading movement out of control
• Rambling epic to be expressed in verse
• Looking up to quote work of lyrical quality
• Done like Donne
• Filled with romantic imagery