where he has not the actual physical possession, he has nonetheless a power or control over that weapon so that his possession thereon continues despite physical possession being in someone else. If this were not so, then an owner of a house who leaves an unlicensed gun in that house but is not present when it was recovered by the police can plead that he was not in possession of it even though he had himself consciously kept it there when he went out. Similarly, if he goes out of the house during the day and in the meantime someone conceals a pistol in his house and during his absence, the police arrives and discovers the pistol he cannot be charged with the offence unless it can be shown that he had knowledge of the weapon being placed in his house. And yet again, if a gun or firearm is given to his servant in the house to clean it, though the physical possession is with him nonetheless possession of, it will be that of the owner. The concept of possession is not easy to comprehend as writers of (sic) have had occasions to point out. In some cases under Section 19(1)(f) of the Arms Act, 1878 it has been held that the word "possession" means exclusive possession and the word "control" means effective control but this does, not solve the problem. As we said earlier, the first precondition for an offence under Section 25(1)(a) is the element of intention, consciousness or knowledge with which a person possessed the firearm before it can be said to constitute an offence and secondly that possession need not be physical possession but can be constructive, having power and control over the gun, while the person to whom physical possession is given holds it subject to that power and control."