But this does not dispose of the difficulties which exist in applying the language of the codicil to the interest taken in the undisposed-of net residue in so far as it is attributable to the lapsed half share in the hotel. How can it be determined what amount of the net residue is attributable to the half share in the hotel? In common with the other assets forming residue the lapsed half share in the hotel appears to have been realized. We were told that the proceeds of the assets other than that half share were roughly equal to the amount of the liabilities and other outgoings charged on the residue. But this equivalence can hardly matter. In fact there was no discrimination in meeting the charges and in law the executors of Ada Ansell were not required to discriminate between the proceeds of the lapsed share in the hotel and the proceeds of the other assets. Unless the terms or implications of the codicil of the testator Francis Allen Ansell, when applied to his will, make it necessary or right to throw notionally the estate duties, funeral and testamentary expenses, debts and other expenses payable under his wife's will against the assets other than the lapsed half share forming residue of her estate, the proceeds of all the assets forming residue must be considered to have borne them rateably. The general rule is that where a payment is made out of an aggregate sum made up from several sources without differentiation, the payment must be taken to have been borne rateably by every part of it so that so much in the pound is provided from the respective sources. This would mean that the proceeds of the lapsed share in the hotel would be treated as bearing a proportion of the debts, estate duties, &c. The amount of the net residue representing or attributable to the lapsed half share would be the proceeds of that half share reduced by this proportion of the debts, estate duties, &c.: cf. Commissioner of Stamp Duties (N.S.W.) v. Perpetual Trustee Co. Ltd. (Saxton's Case) [1] ; W. & A. McArthur Ltd. v. Federal Commissioner of Taxation [2] ; Douglass v. Federal Commissioner of Taxation [3] ; Resch v. Federal Commissioner of Taxation [4] ; Federal Commissioner of Taxation v. Miller Anderson Ltd. [5] . But the question we have to decide concerns the administration of Francis Allen Ansell's estate. It is in the administration of that estate that the question arises what must be treated as representing or attributable to the lapsed half share. In the end, therefore, the question must depend on the intention to be extracted from the will and codicil of that testator. If he is to be taken to have intended that the death duties, liabilities and other outgoings which under his wife's will were to be paid out of the residue should be treated in the administration of his estate as if they were thrown exclusively against the other assets falling into her residue so as to effect a notional exoneration of the lapsed half share of the hotel, then such intention must receive effect. It would mean that for the purpose of the disposition contained in the codicil, the amount of the net residue representing or attributable to the lapsed half share would be the actual net proceeds of the realization of that half share. But we can find nothing in the will or codicil of Francis Allen Ansell to indicate that he did intend thus to throw notionally the death duties, liabilities and other outgoings against other assets to the exoneration of the lapsed half share of the hotel for the purpose of the disposition contained in his codicil. At best all that can be obtained from the codicil is that so much of the assets as come to him under his wife's will as represents or is attributable to the half share of the hotel shall devolve upon Marjorie Sigrid Ekblade. If it means this, then a rateable amount of the net proceeds bearing the same proportion to the net proceeds as the gross proceeds of the hotel bore to the gross proceeds of the assets falling into residue should belong to her.