"I will refer you to your brother Dannie," said Uncle Juvinell; "for he is looking very wise, as if somebody knew a thing or two, and could, were he but called upon, greatly enlighten somebody else. Out with it, Dannie, and let us have it." "Surveying teaches the measurement of land," Dannie made haste to answer; "and a surveyor is one who measures land with the help of a long chain and compass and other instruments. Now, George Washington, for example"-- "That will do, Daniel," said his uncle, interrupting him: "you have made it as clear as daylight already; and I dare say your sister understands you perfectly, without the help of any example." "Oh, I like to have forgotten one thing!" cried Willie. "Tell us what is meant by line of march, manoeuvres on the battle-field, throwing up intrenchments, and the like." To these points, Uncle Juvinell made answer: "An army, my nephew, is said to be on the line of march when it is moving from one place to another. A manoeuvre is an evolution or a movement of an army, designed to mislead or deceive an enemy, or in some way to gain the advantage of him. An intrenchment is a breastwork or wall, with a trench or ditch running along the outside. The breastwork, being formed of the earth thrown up from the trench, serves as a protection against the shots of an enemy. The trench being quite as deep as the breastwork is high, renders it very difficult and dangerous for the works to be taken by storm; for the enemy must first descend into the ditch before he can reach and scale the wall,--an attempt always attended with the greatest peril to those who make it; for they who defend the works, fighting on top of the walls, have greatly the advantage of those beneath. Sometimes intrenchments run in straight or crooked lines, and sometimes enclose an irregular square or circle; and any piece of ground, or body of men, thus enclosed or fortified, is said to be intrenched." "What a pity it is we can never know the name of the Lowland Beauty!" remarked Miss Laura regretfully; for she was getting to be quite old enough to be somewhat interested in matters of this kind. "The name the young surveyor gave her," said Uncle Juvinell, "lends an interest to this part of his life, which a knowledge of her true name might never have awakened. Besides this, my dear niece, if you but be attentive to what I shall relate hereafter, you will learn many things touching the life and character of his mother Mary and his wife Martha far more worthy of your remembrance."