Finally it was submitted for Kratzmann Hardware that its title as registered transferee of the bill of mortgage under the provisions of The Real Property Act of 1861 Q. should have been held to be indefeasible by virtue of s. 44 of that Act. The section contains one of the key provisions of the Act, namely that notwithstanding the existence in any other person of any estate or interest which, but for the Act, might have been held to be paramount or to have priority, the registered proprietor of land or of any estate or interest in land under the provisions of the Act shall except in the case of fraud hold the same subject to such encumbrances, liens, estates or interests as may be notified on the folium of the register-book constituted by the land grant or certificate of title of such land, but absolutely free from all other encumbrances, liens, estates or interests whatsoever. Exemptions are provided for, but they have no application in the present case. The argument is that the interest of Kratzmann Building as registered mortgagee of the land comprised in the bill of mortgage was an interest in land of which that company was the registered proprietor immediately before the transfer to Kratzmann Hardware, that the title of the latter as registered transferee of the interest is, by force of the section, indefeasible unless fraud be proved, and that fraud was not proved. The difficulty in the way of this argument, in my opinion, is that it misconceives the nature of the statutory right of a liquidator to avoid a preference. Just as there was a need to remember, in dealing with the submission of Kratzmann Building concerning the use which the liquidator of Developments made of the bill of mortgage in the lien proceedings before Hart J., that when The Companies Act makes a preference void as against the liquidator it does no more than require that the preference be treated as void for the purposes of the liquidation, so there is need to remember it in the present connexion, when the question that arises is whether the liquidator's statutory right to avoid a preference consisting of a security over land is an "encumbrance, lien, estate or interest" over or in that security. In my opinion it is not. The assumption of the preference sections of The Companies Act and the Bankruptcy Act is that the preference has been validly given, and that save so far as may be necessary for due payment of the debts and the costs and expenses of the winding up or the bankruptcy it will continue to be valid as between the parties to it. No encumbrance or lien is placed upon it; no estate or interest is carved out of it. It remains intact, but is nevertheless to be treated as non-existent in the winding up or bankruptcy of the debtor who gave it. To apply this to the case where the preference has been given by means of a registered bill of mortgage and the mortgage has vested in a third person by means of a registered transfer is not to say that the indefeasibility of a Torrens title is impaired. It is only to say that the subject matter of the Torrens title, though an interest in land, is an interest of a particular kind, namely an interest created by way of security to a creditor, and therefore an interest of which one of the inherent and inescapable incidents is a liability to be treated as void in a winding up (commencing within six months from its creation) or bankruptcy (on a petition presented within six months from its creation) of the debtor by which or by whom it was given. The title to that interest, with that characteristic necessarily attaching to it, has the full degree of indefeasibility for which s. 44 provides. However, bearing in mind the further question mentioned by the Chief Justice in reference to s. 126 of The Real Property Act, I agree with his Honour that we ought not to treat this case as calling for a final decision as to the operation of s. 95 of the Bankruptcy Act, as adapted by s. 293 of The Companies Act to the winding up of a company, in relation to a registered transferee of a registered mortgage of land under The Real Property Act, where it is the giving of the mortgage that is attacked as a preference.