The reason why the dogs were not killed may be thus explained. From the top of the Rapids Tower, before its destruction, the spectator could get a perfect view of the Canadian Fall. On a bright day, by looking steadily at the bottom of the Horseshoe, where water falls into water, he could see, as the spray was occasionally removed, a beautiful exhibition of water-cones, apparently ten or twelve feet high. These are formed by the rapid accumulation and condensation of the falling water. It pours down so rapidly and in such quantities that the water below, so to speak, cannot run off fast enough, and it piles up as though it were in a state of violent ebullition. These cones are constantly forming and breaking. If any strong animal should fall upon one of these cones, as upon a soft cushion, it might slide safely into the current below. The dogs were, doubtless, fortunate enough to fall in this way, aided also by the repulsion of the water from the rocks in the swift channel through which they passed. CHAPTER XV. Wedding tourists at the Falls--Bridges to the Moss Islands--Railway at the ferry--List of persons who have been carried over the Falls--Other accidents. For many years Niagara has been a favorite resort for bridal tourists, who in a crowd of strangers can be so excessively proper that every one else can see how charmingly improper they are. The three fine, graceful bridges which unite Goat Island with the three smaller islands--the Moss Islands, or the Three Sisters--lying south of it were built in 1858. They opened up a new and attractive feature of the locality, with which all visitors are charmed. Those who have been on them will remember what a broken, wild, tangled mass of rocks, wood, and vines they are. Nothing on Onalaska's wildest shore could be more thoroughly primitive. [Illustration: THE THREE SISTERS OR MOSS ISLANDS]