Regarding a statement made by Dr. Hawkins in his book on cholera, viz. "That Moreau de Jonnes has taken great pains to prove that the disease was imported into the Russian province of Orenburg," Dr. H. omits to tell us how completely he failed in the endeavour. In the _Edinburgh Medical and Surgical Journal_ for July, 1831, there is a review of a memoir by Professor Lichtenstaedt, of St. Petersburg, in which M. Moreau's speculations are put to flight. From the efforts of this _pains-taking_ gentleman (M. Moreau) in the cause of contagion in cholera, as well as yellow-fever, he seems to be considered in this country as a medical man; but this is not the case: he raised himself by merit, not only to military rank, but also to literary distinction, and is a member of the Academy of Sciences, where he displays an imagination the most vivid, but as to the sober tact necessary for the investigation of such questions as those connected with the contagion or non-contagion of cholera and yellow-fever, he is considered _below par_. He saw the yellow-fever in 1802-3, at Martinique, while _aid-de-camp_ to the Governor, and still adheres to the errors respecting it which he imbibed in his youth, and when he was misled by occurrences taking place _within a malaria boundary_, where hundreds of instances are always at hand, furnishing the sort of _post hoc propter hoc_ evidence of contagion with which some people are satisfied, but which is not one bit less absurd, than if a good lady, living in the marshes of Kent, were to insist upon it, that her daughter Eliza took the ague from her daughter Jane, because they lived together. Strange to say, however, M. Casimir Perier, the Prime Minister of France, seems to be guided, according to French journals, by the opinions of this gentleman on cholera, instead of by different medical commissions sent to Warsaw, &c.