From Place to Place by Irvin S. Cobb

Somebody said once that facts are stubborn things, which is a lie. Facts are almost the most flexible things known to man. The historian appreciates the truth of this just as the fictionist recognises and is governed by the opposite of it, each according to his lights. In recording the actual, the authentic, the definite, your chronicler may set down in all soberness things which are utterly inconceivable; may set them down because they have happened. But he who deals with the fanciful must be infinitely more conventional in his treatment of the probabilities and the possibilities, else the critics will say he has let his imagination run away with him. They'll tell him to put ice on his brow and advise sending his creative faculty to the restcure.

Jules Verne was a teller of most mad tales which he conjured up out of his head. The Brothers Wright and Edison and Holland, the submarine man, worked out their notions with monkey wrenches and screw drivers and things, thereby accomplishing verities far surpassing the limit where common sense threw up a barrier across the pathway of Verne's genius. H. G. Wells never dreamed a dream of a world war to equal the one which William Hohenzollern loosed by ordering a flunky in uniform to transmit certain dispatches back yonder in the last week of July and the first week of August, 1914.