Nebraska sculptor Linda Egle tools a clay version of the bronze sculpture to honor the Pony Express. (Courtesy City of Gothenburg)LINCOLN — A bronze sculpture of a Pony Express rider, produced by Nebraska artist Linda Egle, will be officially dedicated in Gothenburg at 2 p.m. on April 22. The sculpture, which has been undergoing final touches since being delivered last summer, sits at the Ehmen Park Arboretum in Gothenburg, adjacent to the Pony …