Fourth class mail was a problem, especially as one package exploded prematurely in the village post office, blowing several years of "Wanted" announcements off the notice board and ruining one "Use Next Window" sign - by great good luck the postmaster was out for coffee and his assistant, an elderly lady with weak kidneys, was safe in the washroom.  Jubal considered having all fourth class mail addressed to Mike processed by the bomb-disposal specialists of the S.S, who performed the same service for the Secretary General.