"TWENTY-FIVE DOLLARS REWARD.--Missing, an insane man, named Frederick Liebrich, native of Germany, speaks English, German, and French. Supposed to lodge at night in the police station houses about the lower part of the city; is very stupid looking, and clothed in rags. Was last seen in Washington Market, about the middle of last November. He is about 38 years of age, eyes and hair black, large, regular features, and very dark complexion; about five feet ten inches high, stout built, straight and well made. The above reward will be paid for his recovery, or direct evidence of his death, by Frederick Kummich, 82 Washington Street, Brooklyn. Information to be sent to Inspector Dilks, Police Headquarters, 300 Mulberry Street." LOST CHILDREN. Hundreds of "lost children" bear testimony to the carelessness of mothers and nurses, who are more intent on other business, when their charges stray off, to be found afterwards, in out-of-the-way places, by stray policemen. Quite often a pedestrian will notice, on going along one of our side streets, a young child, its eyes bubbling over with tears, and red from irritation and inflammation, who has strayed from its parents' residence. Sometimes it will have a stick of candy in its infantile fist, or else an apple, or a slice of bread, butter, and molasses, to console it in its wanderings. It is very seldom, however, that these children do not find their way back to their parents, unless that there is foul play, in such instances where a child may be kidnapped by people who are childless, or through their agency, for the purpose of adoption in barren families. The practice of baby-farming has not as yet attained, in America, the height that it has reached in England, and therefore the lives of children are not yet so endangered as they are across the water. It is calculated that at least one thousand children are missing every year in this city, but they are nearly all returned before the close of the day on which they are first missed. THE DENS OF MIDNIGHT.