It was answered from under the bluff.

Tom whistled twice more; these signals were answered in the same way.

Then a guarded voice said: "Who goes there ?" "Tom Sawyer, the Black Avenger of the Spanish Main.

Name your names." "Huck Finn the Red-Handed, and Joe Harper the Terror of the Seas." Tom had furnished these titles, from his favorite literature.
"'Tis well.

Give the countersign." Two hoarse whispers delivered the same awful word simultaneously to the brooding night: "BLOOD!" Then Tom tumbled his ham over the bluff and let himself down after it, tearing both skin and clothes to some extent in the effort.