In its original form, “The Mystery of a Hansom Cab” has reached the sale of 375,000 copies in this country, and some few editions in the United States of America. Notwithstanding this, the present publishers have the best of reasons for believing, that there are thousands of persons whom the book has never reached. The causes of this have doubtless been many, but chief among them was the form of the publication itself. It is for this section of the public chiefly that the present edition is issued.