Unusual material on locks, locksmithing, keys, combinations, by a master, whose memories go back to a childhood in Virginia, schooling in Germany, years as a Marine, work as a riveter, during which he began to put to use his hobby for ferreting out the secrets of looks. Then on to a shop of his own, in New York, where and Del, among others, shared his fascination in problems of fastenings. His proficiency took him to Japan, Germany, Turkey, Russia; it made him welcome in deep sea diving, among the police, the F B I. There are tales of imprisoned treasure, of emergencies in which he was summoned, of situations in which love doesn't laugh at locksmiths, of phony jobs that sometimes brought danger, and of collecting, designing, inventing. Easy, Informal, entertaining -- and a fresh field in careers.