But Captain Smith could not know icebergs were there in such numbers: what warnings he had of them is not yet thoroughly established,--there were probably three,--but it is in the highest degree unlikely that he knew that any vessel had seen them in such quantities as we saw them Monday morning; in fact, it is unthinkable. He thought, no doubt, he was taking an ordinary risk, and it turned out to be an extraordinary one. To read some criticisms it would seem as if he deliberately ran his ship in defiance of all custom through a region infested with icebergs, and did a thing which no one has ever done before; that he outraged all precedent by not slowing down. But it is plain that he did not. Every captain who has run full speed through fog and iceberg regions is to blame for the disaster as much as he is: they got through and he did not. Other liners can go faster than the Titanic could possibly do; had they struck ice they would have been injured even more deeply than she was, for it must not be forgotten that the force of impact varies as the _square_ of the velocity--i.e., it is four times as much at sixteen knots as at eight knots, nine times as much at twenty-four, and so on. And with not much margin of time left for these fast boats, they must go full speed ahead nearly all the time. Remember how they advertise to "Leave New York Wednesday, dine in London the following Monday,"--and it is done regularly, much as an express train is run to time. Their officers, too, would have been less able to avoid a collision than Murdock of the Titanic was, for at the greater speed, they would be on the iceberg in shorter time. Many passengers can tell of crossing with fog a good deal of the way, sometimes almost all the way, and they have been only a few hours late at the end of the journey. So that it is the custom that is at fault, not one particular captain. Custom is established largely by demand, and supply too is the answer to demand. What the public demanded the White Star Line supplied, and so both the public and the Line are concerned with the question of indirect responsibility.