St. Joseph, MO. - Singing Cowboy-Poet Michael Martin Murphey, the top-selling singer-songwriter of American cowboy music, will perform in concert during as part of St. Joseph, Mo.'s Pony Express Sesquicentennial Celebration, Saturday, April 3 at the historic Missouri Theatre. Tickets will be $10-$40 and are available through the Robidoux Resident Theatre, (816) 232-1778, or by visiting www.ponyexpress.net.