In Charles Dickens' novel, A Tale of Two Cities, the Marquis is annoyed with the mender of roads because the man saw someone hanging from a chain beneath the Marquis' carriagebut couldn't give enough information:
...the mender of roads with his blue cap pointing out the chain under the carriage...
The mender of the roads is not able to provide much of a description other than the "stowaway" had a face that was white and he was as tall as a spectre (ghost).
...to whom the mender of roads, with the aid of the blue cap without which he was nothing, still enlarged upon his man like a spectre, as long as they could bear it.
The Marquis, knowing little more than he had before the mender of roads made his report is disgusted with really knowing nothing more and having no way to understand the significance to himself of this mysterious man.
(However, as the story continues, it seems that the father of the little child the Marquis had hit and killed with his carriage is out of his mind with despair. The next morning, the Marquis is found dead.)
Later as a man has been captured for the murder of the Marquis, the mender of the roads provides, once again, a detailed account of what he saw:
“I saw him then, messieurs,” began the mender of roads, “a year ago this running summer, underneath the carriage of the Marquis, hanging by the chain. Behold the manner of it. I leaving my work on the road, the sun going to bed, the carriage of the Marquis slowly ascending the hill, he hanging by the chain—like this.”
It would seem the mystery of the man beneath the carriage has been answered—but not that it would be of any help to the Marquis.