The fact that the land was conveyed to the customer in fraud of his grantor's creditors, where such grantor had an absolute title, is no ground for the principal's refusal to complete the exchange, where the creditors have not impeached the conveyance. Mason v. Hinds, 19 N. Y. S. 996. In another case the contrary doctrine was sustained. Moskowitz v. Hornberger, 46 N. Y. S. 462, 20 Misc. 558.