The telegraph has given the news of the dismissal from the service of Commander Preble, of the blockading squadron off Mobile, for allowing a vessel carrying the English flag to run the blockade, when he had power to prevent it. The people will not complain of any necessary increase of stringency in the Navy Department. An application of equal stringency to some other Departments would not be ungrateful to the popular heart. With reference to this particular case, however, we feel confident, as do the numerous friends of Commander Preble in this city, that when all the facts shall come to be known, he will be restored to his command. Commander P. is a Portland boy, was raised in this city, educated in our Public High School, and is known to be as true a sailor, as honest a man, and as loyal a citizen as ever stepped on shipboard, or obeyed an order. He is a nephew of the late Commodore Preble, and, like his old weather beaten kinsman, has seen hard and honorable service. His friends, we repeat, cherish abiding confidence that there must be palliating circumstances, which, when known, will cause his name to be restored to the service.