'Looking at the statement in the present case, I find there is nothing incriminating in that document. Everything in it from beginning to end is the denial of guilt. ... although it is a denial or exculpation, and therefore it is outside the principle of protection which the common law has thrown around a prisoner to guard him against a confession gained under the influence of a threat or promise, and consequently I am of the opinion that it is not within the Act. I have said that the statement was not incriminatory. I should like to add this: that in one sense a false statement by a prisoner, though a denial or exculpation, might indirectly be the means of convicting him, not by reason of that statement proving his guilt, but by reason of other evidence which shows the statement is untrue, or that the prisoner is unworthy of belief. If he says that he at the time was elsewhere, but it is proved that he was not; or if he says some other person was there and it is proved the other person was not there, that might destroy his defence. It does not, however, prove he actually committed the crime. The prosecution still has to depend on its own affirmative evidence for that, and therefore I do not think a denial or exculpation is, even when contradicted by subsequent evidence, to be regarded as an incriminatory document, in the same sense as a confession or admission of guilt or a statement which is an affirmative link in the chain of evidence, because it admits some fact which tends to prove the guilt of the prisoner.'