Orderly Book.—A record of current orders, whether of commissioned or non-commissioned officers.

Parapet.—A work, breast-high or more, for defence.

Patrol.—A small scouting-party beyond the usual line of sentries; or a detail of search as to the movements of the enemy.

Picket.—An outside sentry, to guard against surprise.

Quota.—A fixed apportionment upon the basis of numbers.

Reconnoissance.—A personal examination of country within the range of military movements.

Redoubt.—An inclosed defence.

Rendezvous.—A designated place for assembling troops or supplies.

Roster.—A list of officers, or of officers and men; on any duty, or subject to duty.

Salient.—An angle projecting outward, toward hostile approach.