The prisoner was a young man of prepossessing appearance, belonging to what may be called the lower section of the middle rank of life, being a frame-work knitter, in the employment of his father, a master manufacturer in a small way. He was tried on an indictment charging him with the offence of arson. A mob, of which he was alleged to be one, had burnt Colwick Hall, near Nottingham, the residence of Mr. Musters, the husband of Mary Chaworth, whose name is so closely linked with that of Byron. This ill-fated lady was approaching the last stage of consumption, when, on a cold and wet evening in autumn, she was driven from her mansion, and compelled to take refuge among the trees of her shrubbery--an outrage which probably hastened her death. The crime with its attendant circumstances, created, as was natural, a strong sympathy against the criminals. Unhappily, this feeling, so praiseworthy in itself, is liable to produce a strong tendency in the public mind to believe in the guilt of the party accused. People sometimes seem to hunger and thirst after a criminal, and are disappointed when it turns out that they are mistaken in their man, and are, consequently, slow to believe that such an error has been made. Doubtless, the impression is received into the mind unconsciously; but although on that ground pardonable, it is all the more dangerous. In this case, the prisoner was identified by several witnesses as having taken an active part in setting fire to the house. He had been under their notice for some considerable space of time. They gave their evidence against him without hesitation, and probably the slightest doubt of its accuracy. His defence was an _alibi_. The frame at which he worked had its place near the entrance to the warehouse, the room frequented by the customers and all who had business to transact at the manufactory. He acted, therefore, as doorkeeper, and in that capacity had been seen and spoken with by many persons, who in their evidence more than covered the whole time which elapsed between the arrival of the mob at Colwick Hall and its departure. The _alibi_ was believed, and the prisoner, after a trial which lasted a whole day, was acquitted.