Servicemen used paintings as dartboards.   Schoolchildren dismantled banisters and paneling for firewood. Architects from the Ministry of Works acted like pocket Stalins. Sarcophagi were dumped in gardens beside beheaded statues. And overhead, Luftwaffe Dorniers droned with menace. Such hazards ravaged requisitioned country houses during the last war. Yet nothing imperilled them more, in the 20th century, than super-taxes and the rattle of death duties.