43 That left for consideration the question whether the relevant event, the death, was an accident and, in my opinion, whilst there was no evidence as it turned out capable of showing that the pistol might have discharged without human agency to depress the trigger, there was evidence, albeit weak evidence, capable of showing that the pistol might have been discharged, not by the voluntary act of the appellant (in the sense in which the term "voluntary act" would be understood as I have discussed the law) but by the conduct of the deceased supervening in the process of discharging the loaded weapon which I have described, by causing pressure to be applied in some way by the appellant to the trigger and thus herself discharging the weapon. In that case it could not be said that any act of the appellant, voluntary or unwilled, caused the pistol to discharge. In that event, the conduct of the appellant as described in the evidence, leading up to the fatal shooting, would still undoubtedly be relevant to prove that he indirectly caused the death, so that it would still be true to say that the appellant killed the deceased, but the question would arise whether, as a result of her intervention by pressing on the pillow and hence upon the pistol so as to cause it to discharge, her death was an event which occurred by accident.