Twentieth century manual of railway and commercial telegraphy (1905)
Meyer, Frederic Louis, b. 1875 · Chicago, New York, Rand, McNally & Company · leaf 120
Locomotive running backward by night without cars.Signals for Train Following areGreen Light and Flag at 1.2—Markers. Locomotive running backward byday without cars.Carrying Signals for Train Following.Denoted at 1 by Green Flag.2 —Markers. MAI^UAL OF TELEGRAPHYMarkers. 117 … Rear of train by night when on siding.Markers, 1 — 1.
Telegraph
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