This reminds me of the remark made to myself once by a lady in reference to this same _Coral Island_. "There is one thing, Mr Ballantyne," she said, "which I really find it hard to believe. You make one of your three boys dive into a clear pool, go to the bottom, and then, turning on his back, look up and wink and laugh at the other two." "No, no, Peterkin did not `_laugh_,'" said I remonstratively. "Well, then, you make him smile." "Ah, that is true, but there is a vast difference between laughing and smiling under water. But is it not singular that you should doubt the only incident in the story which I personally verified? I happened to be in lodgings at the seaside while writing that story, and, after penning the passage you refer to, I went down to the shore, pulled off my clothes, dived to the bottom, turned on my back, and, looking up, I smiled and winked." The lady laughed, but I have never been quite sure, from the tone of that laugh, whether it was a laugh of conviction or of unbelief. It is not improbable that my fair friend's mental constitution may have been somewhat similar to that of the old woman who declined to believe her sailor-grandson when he told her he had seen flying-fish, but at once recognised his veracity when he said he had seen the remains of Pharaoh's chariot-wheels on the shores of the Red Sea. Recognising, then, the difficulties of my position, I formed the resolution always to visit--when possible--the scenes in which my stories were laid, converse with the people who, under modification, were to form the _dramatis personae_ of the tales, and, generally, to obtain information in each case, as far as lay in my power, from the fountain-head. Thus, when about to begin _The Lifeboat_, I went to Ramsgate, and, for some time, was hand and glove with Jarman, the heroic coxswain of the Ramsgate boat, a lion-like as well as lion-hearted man, who rescued hundreds of lives from the fatal Goodwin Sands during his career. In like manner, when getting up information for _The Lighthouse_, I obtained permission from the Commissioners of Northern Lights to visit the Bell Rock Lighthouse, where I hobnobbed with the three keepers of that celebrated pillar-in-the-sea for three weeks, and read Stevenson's graphic account of the building of the structure in the library, or visitor's room, just under the lantern. I was absolutely a prisoner there during those three weeks, for boats seldom visited the rock, and it need scarcely be said that ships kept well out of our way. By good fortune there came on a pretty stiff gale at the time, and Stevenson's thrilling narrative was read to the tune of whistling winds and roaring seas, many of which sent the spray right up to the lantern and caused the building, more than once, to quiver to its foundation.