By the end of 1943 , Heinrich did have a large monograph on oriental Ichneumoninae prepared for publication .
As the front line approached , Heinrich soldered Heinrich 's monograph into a metal box , and secretly buried it in a dry place in the forest .
By the end of 1943 , Heinrich did have a large monograph on oriental Ichneumoninae prepared for publication but as the front line approached , Heinrich soldered his monograph into a metal box , and secretly buried it in a dry place in the forest .