The first point made is that no sufficient ground existed for admitting the evidence of what was done and said about the cars in the absence of the prisoner or out of his hearing. This relates to the instructions for the alteration of the cars and the reducoing and the conversations then taking place. It is urged that the rule under which upon charges of conspiracy evidence is admitted of what is done and said by the parties to the combination in furtherance of the conspiracy is a rule of a special nature and is incapable of application to charges of a sustantive offence. In the Supreme Court the contrary view was adopted and moreover a very wide rule was laid down. It is a mistake to think that the rule the chief application of which is in charges of conspiracy is a special rule of evidence confined to that offence. But at the same time it may well lead to error if the question of the admissibility of such evidence in any given case is treated exactly in the same manner as it might be on a charge of conspiracy. For upon a charge of conspiracy the proof of the crime may well consist in evidence of the separate acts of the individuals charged which, although separate acts, yet point to a common design and when considered in combination justify the conclusion that there must have been a combination such as that alleged in the indictment. When that is so evidence may readily be let in of what each party to the conspiracy alleged may do or say in furtherance of the common purpose. But when a substantive crime, not a conspiracy, is charged in the indictment it is the ingredients of the substantive crime that must be proved, not combination for a common purpose. When the case for the prosecution is that in the commission of the crime a number of men acted in preconcert, reasonable evidence of the preconcert must be adduced before evidence of acts or words of one of the parties in furtherance of the common purpose which constitutes or forms an element of the crime becomes admissible against the other or others, that is to say of course, unless some other ground for admitting the evidence exists in the given case. In The King and The Attorney-General of the Commonwealth v. Associated Northern Collieries (the Coal-Vend Case) [1] Isaacs J. said of evidence of the acts of individuals done in furtherance of a preconcerted common design in cases of conspiracy what is doubly true when such evidence is tendered in proof of a charge of a substantive crime committed by several acting in preconcert: "It is an error to say that acts of one defendant, however numerous, and however pointedly in furtherance of the prohibited purpose, are necessarily admissible as overt acts of (an) offence against a co-defendant charged with conspiring with the first. They are not so admissible unless the two defendants are shown to be associated for that purpose, so as to make the purpose common to both." [2] . It must be remembered that the basal reason for admitting the evidence of the acts or words of one against the other is that the combination or preconcert to commit the crime is considered as implying an authority to each to act or speak in furtherance of the common purpose on behalf of the others. From the nature of the case it can seldom happen that anything said by one which is no more than a narrative statement or account of some event that has already taken place, that is to say, some statement which would be receivable in evidence against the man who made it as an admission and not otherwise, can become admissible under this principle against his companions in the common enterprise. Usually the question of admissibility will relate to directions, instructions or arrangements or to utterances accompanying acts. It is customary at criminal trials simply to treat the presence or absence of the prisoner as decisive of the admissibility of things said and it is a pity to rob that empirical but practical and convenient test of any of its usefulness. But often enough in an ordinary case where there is no confederation or preconcert, directions, instructions and the like although spoken in the absence of the prisoner may, according to the circumstances of the case, be admissible as res gestae or relevant facts. It is easy to understand therefore that preconcert confederacy or combination may make such directions and the like admissible when they are given by one of several acting in preconcert with the prisoner and are given in furtherance of the common design. In the present case the things said and done when the prisoner was not present or within earshot are for the most part of this character and are admissible as part of what was done in furtherance of the common criminal purpose. Indeed the evidence let in at the trial by reference to the rule in question includes little that was inadmissible and certainly nothing the reception of which would justify the grant of special leave to appeal. This point therefore fails.