Milestones, Apr. 19, 1976

Died. Howard Robard Hughes, 70, enigmatic, reclusive billionaire; of kidney failure; while en route from Acapulco to a Houston hospital (see THE NATION).

Died. Mary Margaret McBride, 76, homespun radio talk-show hostess whose loyal fans once filled Yankee Stadium in tribute; after a long illness; in West Shokan, N.Y. On network radio for nearly 20 years, she started her guests talking comfortably "by telling a story about them that's funny or sweet." A Missouri-born Baptist, she refused to advertise either alcohol or tobacco but kept a number of food sponsors very happy...