Thomas Wentworth Higginson, Army Life in a Black Regiment

It was very dark the other night,--an unusual thing here,--and the rain fell in torrents; so I put on my India-rubber suit, and went the rounds of the sentinels, incognito, to test them. I can only say that I shall never try such an experiment again, and have cautioned my officers against it. ‘T is a wonder I escaped with life and limb,--such a charging of bayonets and clicking of gun-locks. Sometimes I tempted them by refusing to give any countersign, but offering them a piece of tobacco, which they could not accept without allowing me nearer than the prescribed bayonet's distance. Tobacco is more than gold to them, and it was touching to watch the struggle in their minds; but they always did their duty at last, and I never could persuade them. One man, as if wishing to crush all his inward vacillations at one fell stroke, told me stoutly that he never used tobacco, though I found next day that he loved it as much as any one of them. It seemed wrong thus to tamper with their fidelity; yet it was a vital matter to me to know how far it could be trusted, out of my sight. It was so intensely dark that not more than one or two knew me, even after I had talked with the very next sentinel, especially as they had never seen me in India-rubber clothing, and I can always disguise my voice. It was easy to distinguish those who did make the discovery; they were always conscious and simpering when their turn came; while the others were stout and irreverent till I revealed myself, and then rather cowed and anxious, fearing to have offended.

It rained harder and harder, and when I had nearly made the rounds I had had enough of it, and, simply giving the countersign to the challenging sentinel, undertook to pass within the lines.