Boy Scouts in Southern Waters; Or, Spaniard's Treasure Chest

"Wow! Look at that one! That's a monster!" "That must be the ninth wave." "What do you mean by the ninth wave, Jack?" "Why, Arnold, don't you know that every third wave is bigger than the two preceding it and that every ninth wave is bigger than the preceding eight?" queried Jack Stanley. "No, can't say that I ever knew that," replied Arnold Poysor leaning out of the pilot house of a sturdy motor boat plowing her way through the waters of that part of the Gulf of Mexico known as Mississippi Sound. "But I do know," he continued, "that if the Fortuna takes many more green ones over her bow, we'll have to get something other than oilskins to keep us dry!"