Nezu assumed the possibility of the Emperor's death was caused by arsenic, after following 'the Emperor's health report' written by the Imperial doctors, that said the Emperor was getting better, Nezu collated the record that all of a sudden the Emperor died in agony.
ねずは、典医たちが発表した「御容態書」のとおり天皇が順調に回復の道をたどっていたところが、一転急変して苦悶の果てに崩御したことを鑑み、その最期の病状から砒素による毒殺の可能性を推定。