The discovery of a pair of pre-Civil War era cannons on the Oregon Coast this week has caused a stir among archeologists, historians and coast residents who have flocked to Arch Cape to get a look. The cannons, which residents and a state park official speculate came from the USS Shark, a survey schooner that ran aground on the Columbia Bar in 1846, washed up this week. One appeared Saturday and the other appeared Monday night as a state park official was documenting the discovery of the first one. The first cannon was spotted by a Tualatin father and daughter,...