https://apnews.com/e64a3849bbba152fd2d3549ad401d18b > SAVANNAH, Ga. (AP) — A warehouse along the Savannah River is holding historical treasures that evidence suggests remained lost for more than 240 years — a cache of 19 cannons that researchers suspect came from British ships scuttled to the river bottom during the American Revolution. > The mud- and rust-encrusted guns were discovered by accident. A dredge scooping sediment from the riverbed last year as part of a $973 million deepening of Savannah's busy shipping channel surfaced with one the cannons clasped in its metal jaws. The crew soon dug up two more.