Morrison Waite,
Railroad Companies v. Schutte…
“ As we have endeavored to show, the bonds, although void as to the State, are valid as to the company that sold them. Having been put on the market by the companies as valid bonds, the companies are estopped from setting up their unconstitutionality. As against the companies, they occupy in the market the position of commercial securities, and may be dealt with and enforced as such. The companies, through their faithless agents, are in a position where they must meet those they have dealt with commercially, and respond accordingly. ”
