In this case, information supplied by a person in custody was “I will produce a knife concealed in the roof of my house” does not lead to the discovery of that knife; knife having been discovered long ago. It leads to the discovery of the fact that a Knife is concealed in the house of the informant to his knowledge and if the knife is proved to have been used in the commission of the offence, the fact discovered is relevant. But if to the statement the words are added “with which I stabbed A” these words are inadmissible since they do not relate to the discovery of the knife in the house of the informant. The object of the section is to admit evidence which is relevant to the matter under inquiry, namely the guilt of the accused and not to admit evidence which is irrelevant.