History of the Peloponnesian War

Having erected a tent, they lay out the bones of the dead three days before, and each one brings to his own relative whatever [funeral offering] he pleases.

When the funeral procession takes place, cars convey coffins of cypress wood, one for each tribe; in which are laid the bones of every man, according to the tribe to which he belonged; and one empty bier is carried, spread in honour of the missing, whose bodies could not be found to be taken up.