There has been a reconciliation between the Wellingtonians and the old Tories, and they are now firmly knit in opposition to the present Government. Winchilsea, who was the last Tory who stuck to Lord Grey, renounced him in a hot speech, which evidently annoyed Lord Grey very much, for he made a long one in reply to him. Winchilsea is a silly, blustering, but good-natured and well-meaning man. Last night 'Hernani' was acted at Bridgewater House before the Queen and all the Royal Family. Aubin, who had acted Don Ruy, was sent to Rome, so Francis Leveson took the part. I was disappointed, though all the company were or pretended to be in ecstasies. The rhyme does not do, the room is not good for hearing, and with the exception of Miss Kemble (who was not so effective as I expected) and Craven, the actors were execrable. [Page Head: PREVENTION OF CHOLERA.] News came the day before yesterday that Marshal Diebitsch had died of the cholera. It was suspected that he had made away with himself, for he has failed so signally in his campaign against the Poles that his military reputation is tarnished; and it is known that his recall had been decreed, and that Count Paskiewitch was to succeed him. The alarm about the cholera still continues, but the Government are thrown into great perplexity by the danger on one hand of the cholera and the loss to trade on the other. A board of health has been formed, composed of certain members of the College of Physicians, Sir William Pym, Sir William Burnet, Sir Byam Martin, Sir James M'Grigor, and Mr. Stewart; and they in their first sitting advised that all the precautions established by our Orders in Council against the plague should be adopted against the cholera. This opinion was given under the authority of Dr. Warren, who, it appears, exercises the same ascendency in this Board that he had previously done in the College of Physicians on the same subject. The fact is that he takes the safe side. They have nothing to do with trade and commerce, which must shift for themselves, and probably the other members will not take upon themselves the responsibility of opposing measures which, if the disease ever appears here, and should they be relaxed, will expose the physicians to the odium and reproach of having been instrumental to its introduction. We, however (Auckland, Poulett Thomson, and I), are resolved to make the Cabinet take upon themselves the responsibility of framing the permanent rules which are to guide us during the continuance of the malady. It is remarkable that there never was more sickness than there is at present, without its being epidemic, but thousands of colds, sore throats, fevers, and such like; and a man at Blackwall has died of the English cholera, and another is ill of it, but their disorders seem to have nothing to do with the Indian cholera, though some of the symptoms are similar. These men cannot have got their cholera from Russia, but their cases spread alarm.