The Diplomatic Corps yesterday attended a Te Deum at the Church of St. Alexander Nevsky. It was the day of that saint, who is the greatest in the Russian calendar. The service was very magnificent and imposing; though the tones of an organ would have made it grander. These are not used in the Greek churches. The emperor was there and appeared to be very devout. He often crossed himself, and in one part of the ceremony kissed the hand of the archbishop. Think of the proudest and most powerful potentate on earth still continuing to do so much reverence to the clergy! Among other miracles, this saint, it is said, rode up the Neva on a grindstone. After the service had concluded in the church, we were present at the erection of a granite column to the memory of the late Emperor Alexander—the largest and heaviest which has ever been erected, it is said, in ancient or modern times. There were 2000 men and an immense quantity of machinery employed. I say again, rely upon the divine blessing and your own judgment in all things, and I shall be content; but let it be taken coolly and not under the influence of the idle talk of others. Settle in no place merely for the sake of a settlement. You shall not be at any loss for money. Give my love to mother and all the family, and believe me to be Ever your affectionate brother, JAMES BUCHANAN. [MR. BUCHANAN TO GENERAL JACKSON.] ST. PETERSBURG, October 1–13, 1832. DEAR GENERAL:— I avail myself of the present opportunity of writing to you with the more eagerness, as I know not when I shall again enjoy that pleasure. The last steamboat for the season will leave here in about a fortnight, and after that period no safe opportunity may soon offer. To put my letters in the post-office here would be most certainly to expose them to the Russian government; indeed they scarcely think it necessary to do up the seals decently of those which I receive.