The reader, if he is obliging, will remember that there was formerly an obstruction in the harbour of San Francisco, called Blossom Rock, which was some fathoms under water, but not fathoms enough to suit shipmasters. It was removed by an engineer named Von Schmidt. This person bored a hole in it, and sent down some men who gnawed out the whole interior, leaving the rock a mere shell. Into this drawing-room suite were inserted thirty tons of powder, ten barrels of nitro-glycerine, and a woman's temper. Von Schmidt then put in something explosive, and corked up the opening, leaving a long wire hanging out. When all these preparations were complete, the inhabitants of San Francisco came out to see the fun. They perched thickly upon Telegraph Hill from base to summit; they swarmed innumerable upon the beach; the whole region was black with them. All that day they waited, and came again the next. Again they were disappointed, and again they returned full of hope. For three long weeks they did nothing but squat upon that eminence, looking fixedly at the wrong place. But when it transpired that Von Schmidt had hastily left the State directly he had completed his preparations, leaving the wire floating in the water, in the hope that some electrical eel might swim against it and ignite the explosives, the people began to abate their ardour, and move out of town. They said it might be a good while before a qualified gymnotus would pass that way, although the State Ichthyologer assured them that he had put some eels' eggs into the head waters of the Sacramento River not two weeks previously. But the country was very beautiful at that time of the year, and the people would not wait. So when the explosion really occurred, there wasn't anybody in the vicinity to witness it. It was a stupendous explosion all the same, as the unhappy gymnotus discovered to his cost. Now, I have often thought that if this mighty convulsion had occurred a year or two earlier than it really did, it would have been bad for me as I floated idly past, unconscious of danger. As it was, my little bark was carried out into the broad Pacific, and sank in ten thousand fathoms of the coldest water!--it makes my teeth chatter to relate it! * * * * * TONY ROLLO'S CONCLUSION.