May 4, 1851.
Alexander Valerovsky, then the Secretary General to the Governor of the Third French Republic, carried the mission entrusted to him by Jerome Bonaparte and went with the exhibition delegation to secretly meet with Queen Victoria and her consort in Britain.
The position of Secretary General was once again vacant, and all members inside and outside the Tuileries Palace turned their attention to Mokar, who was serving as the Director of General Affairs. According to the unwritten rules of power in the Tuileries Palace, after Valerovsky's departure, Mokar was bound to succeed him as Secretary General, leading the secretaries of the Secretariat and assisting Jerome Bonaparte in handling affairs related to the Tuileries Palace and the government.
