I want to know the answer to the following question:
Who did the Tsar send on a mission to Ottoman Sublime Porte?
All the background I'm provided with is that "Nicholas began courting Britain by means of conversations with the British ambassador, George Hamilton Seymour, in January and February 1853.:105 Nicholas insisted that he no longer wished to expand Imperial Russia:105 but that he had an obligation to the Christian communities in the Ottoman Empire.:105". Is that enough to answer the question?
Answer: no