Henry Phelps Johnston, The Campaign of 1776 around New York and Brooklyn
“ All officers are desired to be more careful of discovering the countersign to persons that have no right to know it.Any soldier on guard that discovers the countersign to any of his fellow soldiers, that are not on guard, is to be immediately confined. Every one that gives the countersign, is to give it as softly as possible so that if any person is listening, he may not hear it.The sentries are not to suffer any person to stand near them, while they are on their posts after retreat beating. ”
