The poem describes a snake that comes to drink water from the poet's trough on a hot day in Sicily. As the snake drinks, the poet is conflicted between letting it drink in peace or killing it, as he was taught snakes in Sicily can be venomous. Though afraid, the poet feels honored by the snake seeking hospitality. When the snake finishes and leaves, the poet regrets startling it with a log, seeing it as a mean act. The snake seemed a king in exile, and the poet feels he missed a chance with one of life's lords.