Thoreau: Solon opening the tombs at Salamis

When Solon endeavored to prove that Salamis had formerly belonged to the Athenians, and not to the Megareans, he caused the tombs to be opened, and showed that the inhabitants of Salamis turned the faces of their dead to the same side with the Athenians, but the Megareans to the opposite side. There they were to be interrogated.

Some minds are as little logical or argumentative as nature; they can offer no reason or "guess," but they exhibit the solemn and incontrovertible fact. If a historical question arises, they cause the tombs to be opened. Their silent and practical logic convinces the reason and the understanding at the same time. Of such sort is always the only pertinent question and the only satisfactory reply.

-- from Thoreau's Week