When Alexander I had to deal with affairs of state, he angrily wrote to his former tutor La Harpe: "Decidedly not having any opportunity to give his scientific pursuits that constituted my favorite pastime ... I have become now the most miserable man." And in the years that followed the emperor has repeatedly returned to this his dream, believing truly his calling "in the study of nature." Who killed him, did not awaken to the activities - Carl Linnaeus, Cuvier? "If his majesty man was particularistic, - he wrote about Emperor Paul one of his former mentors - and could completely surrender only one mathematical teaching, then the sharpness of its very convenient to be able to our Russian Pascal".