A Song (Absent from thee) AO2:
Quatrains (ABAB, song-like). Lines 1 and 3: iambic tetrameter, 2 and 4 are iambic trimeter.
Anastrophe of "absent from thee", Chiasmus reflects opposition of day/night and mistress/lover, bird imagery symbolises freedom.
"W" alliteration in stanza 3 (weary), syndetic rhythm in "love and place and truth" (hymn-like). "F" alliteration in stanza 4 shows self-hatred.