The constantly recurring assurances of readiness to obey the universal desire of the Empress betrays loyal especially anxiety, a feeling of uncertainty, which will take place only after many years. Grounds for concern were in abundance. The legal heir was the son of Paul. But, in addition, Shlisselburg Fortress languished Ivan Antonovich, the great-grandson of Peter I's brother Ivan, naznachennogonaslednikom throne of Anna Ivanovna, deposed and imprisoned by Elizabeth. Two years after the reign of Catherine II (the night of 4 on July 5, 1764) Lieutenant Vasily Mirovich standing in the garrison fortress, tried to release "prisoner number 1", but the guards follow the instructions, signed by Peter III and Catherine confirmed: in the case of attempts to release the arrested "kill, and anyone living in his hands will not give." The circumstances surrounding the "conspiracy Mirovich", have never been fully elucidated. The lieutenant, who claimed that he had acted alone, was executed. Catherine manifesto announces tradition Mirovich court began with the words "come to the throne at the request of all the subjects, we would like to alleviate the situation of Prince John, son of Anton and Anna of Brunswick, Mecklenburg, for a short time illegally entered the throne." In the same sentence three times Ekaterina sin against the truth: there was no "desire subjects", the Empress was not going to change the position of a prisoner of Shlisselburg Fortress, which was quite lawful sovereign.