.. the number of the engine [of the train], its profile shown in the upper part of the picture, its wind-cutting fore-part in the center, symbolical of parting, indicates the features of the scene that remain indelibly impressed upon the mind [of the viewer].

In: Inventing Futurism: The Art and Politics of Artificial Optimism, by Christine Poggi, Princeton University Press, 2009, p. 21