Some of Ivan's advisers, including both Sylvester and Adashev, now advised him to make an end of the Crimean khanate, as he had already made an end of the khanates of Kazan and Astrakhan.
As early as 1553 he had ceased to trust Sylvester and Adashev, owing to their extraordinary backwardness in supporting the claims of his infant son to the throne while he himself lay at the point of death.
A visit to southern Italy, where many of the princes did homage to the emperor, was cut short by the death of the pope, to whose chair Otto then appointed his former tutor Gerbert, who took the name of Sylvester II.
It was not till more than half a century later that an American, Sylvester Marsh, employed the rack system for the purpose of enabling trains to surmount steep slopes on the Mount Washington railway, where the maximum gradient was nearly 1 in 22.
Even after Gerbert of Aurillac, better known as Pope Sylvester II.