Mrs. Ludlow was the eldest of the three sisters, and was usually thought the most sensible; the classification being in general that Lilian was the practical one, Edith the beauty and Isabel the “intellectual” superior. Mrs. Keyes, the second of the group, was the wife of an officer of the United States Engineers, and as our history is not further concerned with her it will suffice that she was indeed very pretty and that she formed the ornament of those various military stations, chiefly in the unfashionable West, to which, to her deep chagrin, her husband was successively relegated. Lilian had married