This turned out not to be necessary; Mike could spot a "wrongness" about a package without opening it.  Thereafter all fourth class mail was unsacked in a heap just inside the gate; then, after the postman had left, Mike would pry through the pile from a distance, cause to disappear any harmful parcel; then Larry would truck the remainder to the house.  Jubal felt that this method was far better than soaking suspect packages, opening them in darkness, X-raying them, or any other conventional method.