NEWPORT NEWS, Va. - An archaeologist is taking a second look at a small cannon found by fishermen off the Virginia coast more than two decades ago in hopes of determining how it got to the bottom of the ocean — and who left it there. Rod Mather, a professor of maritime history and underwater archaeology at the University of Rhode Island, has studied the 25-square-mile area surrounding the site where the cannon was found the past two summers. Some historians believe the 4-feet-long, 300-pound cannon, which was loaded when it was found 24 years ago, is an English cannon...