What literary device is used in it was the nightingale and not lark that pierced fearful hollow of thine ear?

The literary device used in the line "It was the nightingale, and not the lark, that pierced the fearful hollow of thine ear" is personification.

Here's why:

* Personification: Giving human qualities to non-human things. In this case, the nightingale is given the ability to "pierce" the "hollow" of someone's ear. This is a human action, implying that the bird's song has a powerful effect on the listener.

Other literary devices might also be present:

* Metaphor: The "fearful hollow of thine ear" could be seen as a metaphor for the listener's mind, suggesting the song is penetrating their thoughts or emotions.

* Imagery: The line creates a vivid image of the song's sharp, penetrating quality.

Let me know if you'd like to explore these other devices further!