Two groups from the Houston Boychoir will perform a free concert June 18 in the Woodward-Dellis Recital Hall at Hardin-Simmons University. The concert begins at 6:30 p.m. Young Audiences of Abilene, under the direction of Executive Director Laura King, is bringing the choir to Abilene. Performances will be by the Boychoir Chamber Choir and the Boychoir Olde Boys.  The following