distinction between the offence of abetment as defined in Section 107 (Chapter V) and the offence of criminal conspiracy as defined in Section 120-A (Chapter V-A). Under Section 107, second clause, a person abets the doing of a thing, who engages with one or more other person or persons in any conspiracy for the doing of that thing, if an act or illegal omission takes place in pursuance of that conspiracy, and in order to the doing of that thing. Therefore, in order to constitute the offence of abetment by conspiracy, there must first be a combining together of two or more persons in the conspiracy; secondly, an act or illegal omission must take place in pursuance of that conspiracy and in order to the doing of that thing . It is not necessary that the abettor should concert the offence with the person who commits it. It is sufficient if he engages in the conspiracy in pursuance of which the offence is committed. It is worthy of note that a mere conspiracy or a combination of persons for the doing of a thing does not amount to an abetment. Something more is necessary, namely, an act or illegal omission must take place in pursuance of the conspiracy and in order to the doing of the thing for which the conspiracy was made . Before the introduction of Chapter V-A conspiracy, except in cases provided by Sections 121-A, 311, 400, 401 and 402 of the Indian Penal Code, was a mere species of abetment where an act or an illegal omission took place in pursuance of that conspiracy, and amounted fee a distinct offence. Chapter V-A, however, introduced a new offence defined by Section 120-A. That offence is called the offence of criminal conspiracy and consists in a mere agreement by two or more persons to do or cause to be done an illegal act or an act which is not illegal by illegal means; there is a proviso to the section which says that no agreement except an agreement to commit an offence shall amount to a criminal conspiracy unless some act besides the agreement is done by one or more parties to such agreement in