In Bank of Leavenworth v. Hunt, 11 Wall. 391 (1871), the validity of a chattel mortgage was in question. But it had not been filed in the office of the register of deeds, as required by the statutes of Kansas, and under those statutes was, therefore, void as against creditors. It was said in the opinion that it was void for another reason, and that was, that the mortgagors were permitted to remain in possession and to continue to sell the goods as before the mortgage. But as appears from the statement of facts, these sales were not made with a view of appropriating the surplus proceeds to the payment of the mortgage debt, but for the sole benefit of the mortgagors.