The Rev. William P. Lytle, a staunch supporter of Presbyterian reunion who served as moderator of the General Assembly of the former United Presbyterian Church in the United States of America (the “northern stream”) in 1978 ― just five years before it combined with the southern stream Presbyterian Church in the United States to form the Presbyterian Church (U.S.A.) ― died May 27 in Los Gatos, Calif., after a lengthy illness. He was 87.