An amusing filibustering incident has occurred during the week. The Spaniards obtained information that the Cubans were fitting out a large expedition with arms and men for the insurgents. They had engaged a ship called the _Premier_ for this purpose, and were making their preparations with all possible haste and secrecy. The Spaniards gave information to our Government, and requested that the expedition be stopped. But the Cubans have as many spies around as the Spaniards, and it was soon learned that the _Premier_ expedition was known to the authorities. Without appearing to change their plans about the _Premier_, the Cubans made a secret arrangement with another ship called the _Silver Heels_, and prepared her to take their cargo instead of the _Premier_. The watchful Spaniards soon found out about the new vessel, and even learned the hour and dock at which she was to receive her cargo. Our Government was warned, and a revenue cutter got ready to intercept the _Silver Heels_ as soon as she should really have started on her voyage. The Cubans were attempting to load and despatch their vessel from the port of New York, and so it was expected that, with all the police boats and cutters available here, it would be an easy matter to catch and convict all concerned in the expedition. A detective was sent to watch the dock at which the _Silver Heels_ was to be loaded. Sure enough, the vessel slipped up to the pier as soon as night had fallen, and the detective watched suspicious-looking cases being hastily put on board, and suspicious-looking characters taking passage in her. He became convinced that a filibustering expedition was indeed being sent out. To make quite sure, he watched until the last of her load was put on board. The last man had reached the deck, and the vessel, in tow of a river tug, had once more pulled out of the dock. He then hurried down to the Battery and told what he had seen, and with several other officers got on board the cutter and started to intercept the _Silver Heels_ as she came down the Bay on her way to sea. To you who do not know New York Harbor, it may be as well to explain that New York, or Manhattan, Island lies between the Hudson River and the Sound, an arm of the sea which is called the East River as it flows by New York. This East River which, as it widens, becomes Long Island Sound, separates Manhattan Island from Long Island, which, as its name suggests, is a long strip of land stretching along the coast for miles above and below New York city, forming the beautiful New York Bay and Harbor below the city, and the equally lovely Long Island Sound above the city. The Atlantic Ocean washes the outer shore of Long Island, and ships leaving the port of New York can reach the sea either by going above the city through Hell Gate and Long Island Sound, or below the city down the Harbor and Bay, and out through the Narrows, past Sandy Hook and Fire Island.