The evidence and explanation that show how the historical setting contributes to the effect of personification in the passage is:
“and in the drone of the aeroplane the voice of the summer sky murmured its fierce soul”. This expresses the sound of a plane of that time period.
This line personifies the summer sky, suggesting it has a voice and a fierce soul, connecting the technological advancements of the time (like aeroplanes) to the natural world. The historical context of flight and mechanization during that period enhances the emotional impact of the description, illustrating a blend of nature and technology.