What does "a door half open and revealing the form of a soldier peering out" in the text mean?

He wrote in his notes, ‘All the streets deserted, gloomy and morose, as before some terrible thunderstorm.’ There were no women to be seen and the shops were all closed, ‘with here and there a door half open and revealing the form of a soldier peering out’. Story had heard rumors that the Roman National Guard ‘are... show more He wrote in his notes, ‘All the streets deserted, gloomy and morose, as before some terrible thunderstorm.’ There were no women to be seen and the shops were all closed, ‘with here and there a door half open and revealing the form of a soldier peering out’. Story had heard rumors that the Roman National Guard ‘are nearly unanimous in desiring the return of the pope and the abolition of the Triumvirate and the Republic,
and that they will not fight’

Any comments would be appreciated.
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