Every one ought to be happy at Christmas. But there are many things which ought to be, and yet are not; and people are sometimes sad even in the Christmas holidays.The Captain and his wife were sad, though it was Christmas Eve. Sad, though they were in the prime of life, blessed with good health, devoted to each other and to their children, with competent means, a comfortable house on a little freehold property of their own, and, one might say, everything...