John the Third, in 1473, married the Princess Sophia, the daughter of Thomas Paléologus Porphyrogénétus, who was the brother of Constantine Paléologus, who died in 1453, whilst seeing his capital fall under the dominion of the Turks. By his unison with the last descendant of the Paléologus, John the Third considered himself as the heir of their crown, and after his marriage he substituted the eagle with two heads for the cavalier which was then the arms of the grand principality, and it was then that he took the title of Tsar. _Saturday._ This Mr. Gretsch is the editor of the _Northern Bee_ of St. Petersburg, the principal Russian journal. He is also on a visit here for the first time. He came up to me the other day at the Treasury and introduced himself, since when he has been uncommonly kind. He appears to be, for I know not what he is, a frank, open-hearted, talkative, well-informed person, but something of a bore. He laughingly styled the sultan this morning “our Governor General of Turkey.” I am persuaded this is now the feeling in Russia. They believe themselves to be already the virtual masters of Constantinople. Mr. G. and myself afterwards went to the Mountain of Sparrows. It is on the southwest of the city opposite or nearly so the monastery of Novo Devitcher. From thence you have the best view of Moscow, and it is truly a beautiful and magnificent spectacle. It was here that they commenced the foundation of the cathedral of St. Sauveur, in consequence of a vow of the Emperor Alexander during the French war; but it has been discontinued, and will be erected in another part of the city. The place was found to be too extensive and too expensive, though the vow was to build the greatest and most magnificent church in Russia. We next visited the garden of Niéschouchin, from whence also we had another fine view of the city. We there saw a theatre _sub Jove_. The opinion of Dr. Alfonskoi on the cholera is that it arises in all cases from a defect of heat in the system, and his universal remedy, after he came to understand the disease, was the hot, very hot bath. He is fully convinced it was not contagious. It seized on those whose digestive powers had been enfeebled by drunkenness or high living. I told him of Dr. Stevens’ saline treatment, and he said, from the development of heat, [which] the salt produced in the system, it might have been a good remedy. The cholera, Dr. A. thinks, came from the earth, is connected with gravity. The grip is its opposite and is connected with electricity. This last the best evidence that the cholera has finally disappeared. The stomach the root, as of a tree, etc. _Sunday, 16th June._