Just reading the title the reader may expect the poem to be set in a country becouse a reaper generally works in a field. One intersting element that may drow attenction at the reader is the use of the adjective solitary. The choise may anticipate a melancholic atmosphere or a sad one.

The speaking voice invites the passer-by to look at the girl, who is working alone in the fields , why she is reaping, she is singing  and also he know us where the background is set-up; in the Highlands, the montainous region of Scotland.

The poem is organised into four stanzas made up eight lines each where the poet at first provides the reader with the description of background and reaper's moviment and voice, then he compares the girl's song with the voice of the Cuckoo-bird in spring- time.

Poet seems to be suffering from the voice of the girl becaouse he uses words like "never" or "thrilling" and he makes some sentences with exclamation point.

This is confirmed by third stanza where the poet makes hypothesis about the possible content of the song: old, unhappy, far- off things? Battles long ago?.. After being questioned poet draws a concusion where he underlines the sound of that melody he would flow with himself even after not having heard more.

There are a lot of enjambements, about two for each stanzas, and a lot of strong puntuation: semicolon, exclamation point , questions mark, stop point and two deshes. This punctuation is to indicate long pauses and it causes a reflection of thepoet.

The poet seems to be fallen in love with the girl or better with her voice.

With the Rhyme scheme the reader can links first with third line, second with fourth, fiveth with sixth and , at the end, seventh with eighth of every stanzas.

Words are not recurred and the predominant verb tense is simple past.

The semantic field if of course rural landscape of Scotland and the theme of pleasure, of love for something like the song.

Most important simily is in the line fourteen where the poet compares girl's with the Cuckoo-bird as i said before.

In my opinion the poet has been impressed from something that it has been fallen him to a status of melancoly, pleasure and reflection; maybe while he was doing a travel trought the hills.