For the great benefit and advantage of the community, Medical Boards have recently been announced in various parts of the Metropolis, where, according to the assertions of the Principals, in their advertisements, every disease incident to human nature is treated by men of skilful practice; and among these truly useful establishments, those of Drs. Cooper, Munro, and Co. of Charlotte house, Blackfriars, and Woodstock-house, Oxford-road, are not the least conspicuous. Who these worthies are, it is perhaps difficult to ascertain. One thing however is certain, that Sir F----s C----e D--n--ll, M.D. is announced as Treasurer, therefore there can be no doubt but that all is fair above board, for “Brutus is an honourable man, So are they all--all honourable men.” And where so much skill derived from experience is exercised, it cannot be doubted but great and important benefits may result to a liberal and enlightened people. Of the establishment itself we are informed by a friend, that having occasion to call on the Treasurer, upon some business, the door was opened by a copper-coloured servant, a good-looking young Indian--not a fuscus Hydaspes, but a serving man of good appearance, who ushered him up stairs, and introduced him to the front room on the first floor, where all was quackery, bronze and brass, an electrical machine, images, pictures and diplomas framed and glazed, and a table covered with books and papers. In a short time, a person of very imposing appearance entered the room, with his hair profusely powdered, and his person, from his chin to his toes, enveloped in a sort of plaid roquelaure, who, apologizing for the absence of the Doctor, began to assure him of his being in the entire confidence of the Board, and in all probability would have proceeded to the operation of feeling the pulse in a very short time, had not the visitor discovered in the features of this disciple of Esculapius a person he had known in former times. 'Why, good God!' cried he, 'is that you?--What have you done with the Magic- lantern, and the Lecture on Heads?--am I right, or am I in fairy-land?' calling him by his name. It was in vain to hesitate, it was impossible to escape, the discovery was complete. It was plain however that the dealer in magical delusions had not altogether given up the art of legerdemain, which, perhaps, he finds the most profitable of the two.