Henry Billings Brown,
Pearsall v. Great Northern Railway Company…
“ Nothing is to be taken as conceded but what is given in unmistakable terms, or by an implication equally clear. The affirmative must be shown. Silence is negation, and doubt is fatal to the claim. This doctrine is vital to the public welfare. It is axiomatic in the jurisprudence of this court.'Hence an exclusive right to enjoy a certain franchise is never presumed, and, unless the charter contain words of exclusion, it is no impairment of the grant to permit another to do the same thing, although the value of the franchise to the first grantee may be wholly destroyed. ”
