metaphor shows how they don’t allow eachother to become disconnected. Icy miles would typically be pathetic fallacy to denote to something negative but dooley doesn’t allow it to do so.
he saw the first lapwings turn and came inside to write to me, his knuckles singing
The colloquialism shows the characters familiarity with each other. The joyful connotation of singing shows the letters aren’t just a means of writing to each other.
Allusion to springtime sets up hopeful tone for poem and references to cyclicity of nature, showing how their relationship is firmly planted in mutual admiration for nature.
Its you who sends me word of that other world, pouring air and light into an envelope
alliteration highglights the difference between the urban life the speaker is living in and the rural life.
Metaphor highlights the joy writing letters gives to the pair. Could also reveal how speaker feels trapped within her urban life
structure
free verse- conversational + light, their relationship is natural and not forced
internal rhyme- rhytmic connection, musicality and harmony between the two