And this would undoubtedly be the case if the conditions of the several examples were at all similar. But the hesitation or temporary misapprehension of captains or crews, in a thousand instances, as to the nature of a string of weed, supine on the surface, and lashed into fantastic motion by the surge of the ocean waves, has absolutely no bearing on the positive stories of a creature which is seen in calm fjords and bays to roll itself coil after coil, uplift its head high above the water, exhibit capacious jaws armed with teeth, conspicuous eyes, and paws or paddles, which pursues and menaces boats, presents a tangible object to a marksman, and when struck disappears with a mighty splash. The probability of a gigantic seal, or of a string of porpoises, being mistaken for a sea-serpent by post-captains and their officers in the Navy is small, but becomes almost, if not quite, impossible when the observers are fishermen on coasts like those of Norway, who have been in the habit of seeing seals and porpoises almost every day of their lives. We may, therefore, freely grant that occasional mistakes have arisen, just as we have admitted that undoubtedly many hoaxes have been indulged in. A rational and commonplace explanation is quite possible in some cases, as, for example, in that of a creature of abnormal appearance seen by the crew of Her Majesty's yacht, the _Osborne_, in the Mediterranean, which was suggested, with great probability, to have been, if I remember correctly, some species of shark; while the supposed sea-serpent, washed up on the Isle of Stronsa, in 1808, proved, on scientific examination, to be a shark of the genus Selache, probably belonging to the species known as "the barking shark." The great oceanic bone shark, known to few except whalers, which has been stated to reach as much as sixty feet in length, may also occasionally have originated a misconception; and there must be still remaining in the depths of the ocean undescribed species of fish, of bizarre form, and probably gigantic size, the occasional appearance of which would puzzle an observer. For example, in November 1879, an illustration was given in the _Graphic_ of "another marine monster," professing to be a sketch in the Gulf of Suez from H.M.S. _Philomel_, accompanied by the following descriptive letter-press:-- "This strange monster," says Mr. W. J. Andrews, Assistant Paymaster, H.M.S. _Philomel_, "was seen by the officers and ship's company of this ship at about 5.30 P.M. on October 14, when in the gulf of Suez, Cape Zafarana bearing at the time N.W. seventeen miles, lat. 28° 56' N., long. 32° 54' E.