The texture of the printed image is of such peculiar character that neither brush or liquid paint seem capable of imitating it. - Alfred Horsley Hinton

There is a difference in printing greater depth to any portion with the negative and shading down without the negative. In the former case we get a deeper and stronger image, still preserving to a great extent the relative contrasts between the lights and shades in that portion. This is not always what we require. In order to concentrate attention upon that is, to emphasize, some particular spot, it may be desirable to shade down and flatten some portion.

I have sometimes felt that writers on the artistic aspect of photography have too often, like the reformers of religious creeds, led their followers into a condition of disbelief and unrest, and then left them to find out for themselves how to live up to new and vague beliefs, so many writers on Pictorial Photography have told us what to avoid without saying why, and have then told us what to do without showing how.

...he (a photographer) forgets that unless he has learnt when the tones of a picture are right or not, he will not know whether his work is good or bad, nor know what to try and overcome in future.