A traveling piece of history rolled into Temple Monday as the United States Postal Service's "Celebrate the Century Express" came to a stop about 5:45 p.m. at the Santa Fe Depot.The touring train came to Temple from Mineola.They are the only Texas cities the exhibit on tracks is stopping in during its 100-city tour that began in March 1999 and will conclude in October, said Temple Postmaster William Morris.The exhibit will be open 8:30 a.m.-4 p.m. Friday, and 9 a.m.-5 p.m. Saturday and Sunday while at the depot, 315 W. Ave. B,.Free train tours will be offered throughout the vehicle's visit and about 1,400 area fourth-and fifth-graders will tour the train Friday, Morris said.The train includes a restored 1926 Pullman that was used for activities including sorting mail and another "business car" that held a living room, dining room and kitchen used by traveling railway company dignitaries, officials said. by Jonathan Walburgh