Horace Gray, Insurance of North America v. Guardiola…
“ Upon these letters being offered in evidence by the plaintiffs, the defendant objected that they were irrelevant and incompetent, and duly excepted to the ruling of the court admitting them. It is too clear for discussion that these letters, written to the plaintiffs by their own agents, were no part of the transaction of shipping the sugar, but were mere reports by the agents to their principals, and were incompetent, either in themselves, or in corroboration of the testimony of the agents, to prove the facts recited in the letters against third persons. ”
