“In selecting our subject then we have two things to consider. First, is it as good as the conditions will let it be - that is, have we chosen the point of view which, with the present conditions, shows at its best pictorially, and secondly, if taken from this point now, are the alterations we would like, weather or light, to make for us of such a kind that we can introduce them for ourselves when printing, and, if so, what are those alterations.”