History of the Peloponnesian War

Thucydides

Thucydides. History of the Peloponnesian War. Crawley, Richard, translator. London and Toronto: J. M. Dent and Sons Ltd.; New York: E. P. Dutton and Co., 1914.

Divers also swam in under water from the harbour, dragging by a cord in skins poppy-seed mixed with honey, and bruised linseed; these at first escaped notice, but afterwards a look-out was kept for them.

In short, both sides tried every possible contrivance, the one to throw in provisions, and the other to prevent their introduction.