Ten stories of many moods, from the ambivalent triumph of a boy over a long-hunted wolf (Dion Henderson's ""Wolf of Thunder Mountain"") to the more assured realization of courage in Annixter's ""Woods-Devil"" and the inevitable but reluctant slaying of an East African rhino in Edison Marshall's ""The Last Charge."" Some names -- London, MacKinlay Kantor, Robert Murphy -- you'll recognize immediately; the others are less well known, but the stories, of fairly high quality, all involve boys. In her brief preface, Miss Fenner distinguishes between hunting as sport and as a way of life; here the way of life is set in the past (in several locales) and the sporting variety is never in the raw or random barrel. A steady aim.