John Marshall,
Reynolds v. McArthur — Opinion of the Court
“ The instructions to the jury, for which the plaintiff applied to the state court, are some of them mixed questions, involving fact with law, and requiring the court to decide the fact, and then to declare the law upon that fact. Others propose a rule, as of universal application, to ascertain the main branch of a river, and the source of that main branch, which would unquestionably, in many cases, mislead us. They propose one single circumstance, in exclusion of all others, as being the infallible evidence of a complex fact depending on a number of varying circumstances. ”
