ALTON -- To the surprise of tree-cutters in Alton Cemetery, a 150-year-old ash revealed a secret it had kept inside its "heart" for possibly more than a century. Jim Scroggins, 27, and Mark Brunetto, 31, both of Holiday Shores and owners of Holiday Tree and Landscape, discovered a limestone headstone dating to 1854 inside the 90-foot tree they were cutting down June 17. As it grew slowly over the years, the tree enclosed the grave marker in its middle, surrounding it with wood and bark and eventually reaching a diameter of 4 feet. The growth process of the tree also...