"Evening in Autumn" is part of a longer work, The Seasons, written by James Thomson, a Scottish poet who was born in 1700 and died in 1748. Thomson is remembered for two works: The Seasons, and the lyrics to "Rule, Britannia!" Thomson had initially studied for ministry in the Church of Scotland at the University of Edinburgh, but rather than pursuing a ministerial career, moved to London in 1725 and worked as a school teacher and private tutor. Nonetheless, his deep sense of spirituality can still be seen in the poem.
"Evening in Autumn" is written in blank verse, or unrhymed iambic pentameter. It describes sunset in rural Scotland, and how the fog rises from the ground as the air cools over the marshes and dales. It gives a broad overview of the scenery, rather than focusing on one specific area. The narration is in third person, and gives an omniscient viewpoint (as opposed to being localized in terms of what can be seen through the eyes of a single individual). Perhaps the most striking element of the poem is the way it describes the sublunary sphere as bathed in the radiance of sun on one side and moon on the other, almost as a metaphor for how the human world is surrounded by divine benevolence.