In an old Horatio Alger book, in the back where other series of books are listed/advertised, you can find The Jack Harkaway series with the subscript : For a regular thriller send me directly to Jack Harkaway. This book is illustrated. There is no pub date in the book but it appears to be c. 1900*. The autor, Bracebridge Hemyng lived from 1841 to 1901. On the copy right page of this book it says this title is #14 in the series. this is what is called a DIME NOVEL in the US or a BLOOD NOVEL in England. The author was British. He lived in the US in the 1870s and wrote & published most (or maybe all) of the Harkaway novel during that decadeafter which he returned to England. ** This book has no date in itbut we have found documentation of the title being listed as one that was available from this publisher in a Horatio Alger book  that book was also dateless but it contained an inscription dated 1913.