Just because a picture is unusually low in tone, it is not necessarily pictorial. - Arthur Hammond

To learn to see pictorially is the first essential duty of the would-be picture-maker.

A small but noticeable patch of contrasting light or dark tone would more correctly be described as an accent than as a mass, and it will be found that, as a rule, an accent is needed to prevent a picture from becoming monotonous and uninteresting.

So photography, having a place among artistic processes, has its own distinguishing quality which cannot be duplicated by any other medium.