From the cool wells of the midnight air My spirit drank repose;
The fountain of perpetual peace flows there, -
From those deep wells flows. 7. What does the Powys’s spirt drink?

a is is the correct answer

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.