 Defendants thus had the duty to come forward and justify Gamco's ouster.This they failed to do save by a suggestion of financial unsoundness obviously hollow in view of the fact that the latter's affiliation with Sawyer & Co. put it in a far more secure credit position than it had enjoyed even during its legal tenancy.We therefore hold that, although selection and discrimination among those who would become lessees was necessary, defendants have failed to show that the basis for their action here was innocent of the economic consideration alleged.