With thanks, Harold took the offered magnet, tied it to a string, and soon recovered his knife.

CHAPTER V

RILEY--A THUNDERSTORM--ASCERTAINING THE DISTANCE OF OBJECTS BY SOUND--SECURITY AGAINST LIGHTNING--MEANS OF RECOVERING LIFE FROM APPARENT DEATH BY LIGHTNING

A few days after this incident another visitor was seen coming from Fort Brooke. This person was not a horseman, but some one in a boat, who seemed even from a distance to possess singular dexterity in the use of the paddle. His boat glided over the smooth surface of the bay as if propelled less by his exertions than by his will. Dr. Gordon viewed him through the spy glass, and soon decided him to be an Indian, who was probably bringing something to sell.

It so turned out. He was a half-breed, by the name of Riley, who frequently visited the fort with venison and turkeys to sell, and who on the present occasion brought with him in addition a fine green turtle. Major Burke, conceiving that his friends at Bellevue would prize these delicacies more than they at the fort, to whom they were no longer rarities, had directed the Indian to bring them, with his compliments, to Dr. Gordon.

Riley was a fine looking fellow, of about thirty years of age--tall, keen-eyed, straight as an arrow, and with a pleasing open countenance. He brought a note from the fort, recommending him for honesty and faithfulness.

Dr. Gordon was so much pleased with his general appearance, that he engaged him to return the following week with another supply of game, and prepared to remain several days, in case he should be needed in raising the timbers of the new house.

Toward the close of the week, the weather gave indications of a change. A heavy looking cloud rose slowly from the west, and came towards them, muttering and growling in great anger. It was a tropical thunderstorm. The distant growls were soon converted into peals. The flashes increased rapidly in number and intensity, and became terrific. Mary and Frank nestled close to their father; and even stout-hearted Harold looked grave, as though he did not feel quite so comfortable as usual.

"That flash was uncommonly keen," Robert remarked, with an unsteady voice. "Do you not think, father, it was very near?"

Instead of replying, his father appeared to be busy counting; and when the crash of thunder was heard, jarring their ears, and making the earth quiver, he replied,