William Duane, A military dictionary
“ As it is almost impossible for squadrons to keep constantly close together; and as it almost always happens, that, in order to conceal a march from the enemy, no trumpet must be sounded, (which would otherwise serve for a direction in [387] the night time) a good non-commissioned officer, with four or six men, must be appointed to the rear of every squadron, who are to divide themselves, and form a chain in the interval, between it and the one succeeding, in order to prevent any mistake of the road. ”
