Run-on lines, also known as enjambment, refer to lines in poetry where the sentence or phrase continues from one line to the next without a pause or punctuation mark at the end of the line. In this poem, the run-on lines create a sense of continuous flow and connection between ideas, which contributes to the overall tone of lamentation or mourning expressed by the speaker. The speaker laments the state of the land and expresses sorrow, grief, and lament over the hardships and losses endured.