“Like a star of heaven
In the broad daylight.”
2. Metaphor:
“From rainbow clouds there flow not
Drops so bright to see,
As from thy presence showers a rain of melody.”
“Or how could thy notes flow in such a crystal stream!”
“In the golden lightning
Of the sunken sun.”
3 and 4. Metonymy and Synecdoche are nearly related and in this poem the examples are numerous. Here are a few:
“Better than all treasures
That in books are found.”
“Teach me half the gladness
That thy brain must know.”
“Thou art unseen, but yet I hear thy shrill delight.”