_Thursday, 18th._--The Brooklyn Twenty-Third are ordered to assemble at their armory, corner of Fulton and Orange streets, at 7 o'clock, A.M., fully armed and equipped, and with two days' cooked rations in their haversacks, to march at 8 o'clock precisely. The gallant fellows are up with the larks: a hundred last things are done with nervous haste; father and brother give and receive the parting brave hand-grip; mother and sister and sweetheart receive and give the last warm kiss; and with wet eyes, but in good heart, we set out for the rendezvous. There is remarkable promptitude in our departure. At the instant of 8 o'clock,--the advertised hour of starting,--the column is moving down Fulton street toward the ferry. The weather is auspicious--the sun kindly veiling his face as if in very sympathy with us as we struggle along under our unaccustomed burden. From the armory all the way down to the river it is a procession of Fairy-Land. The windows flutter with cambric; the streets are thronged with jostling crowds of people, hand-clapping and cheering the departing patriots; while up and down the curving street as far as you can see, the gleaming line of bayonets winds through the crowding masses--the men neatly uniformed and stepping steadily as one. Bosom friends dodge through the crowd to keep along near the dear one, now and then getting to his side to say some last word of counsel, or to receive commission to attend to some forgotten item of business, or say good-bye to some absent friend. As we make our first halt on the ferry-boat the exuberant vitality of the boys breaks out in song--every good fellow swearing tremendously, (but piously) to himself, from time to time, that he is going to give the rebels pandemonium, alternating the resolution with another equally fervid and sincere that he means to "drink" himself "stone-blind" on "hair-oil". What connection there is in this sandwich of resolutions may be perhaps clear to the old campaigner. To passing vessels and spectators on either shore the scene must be inspiriting--a steamboat glittering with bayonets and packed with a grey-suited crowd plunging out from a hidden slip into the stream, and a mighty voice of song bursting from the mass and flowing far over the water. To us who are _magna pars_ of the event, the moment is grand. Up Fulton street, New York, and down Broadway amid the usual crowds of those great thoroughfares, who waved us and cheered us generously on our patriotic way, and we are soon at the Battery where without halting we proceed on board the steamboat "John Potter" and stack arms. There is running to and fro of friends in pursuit of oranges and lemons--so cool and refreshing on the hot march--and a dozen little trifles with which haversacks are soon stuffed. One public-spirited individual in the crowd seizes the basket of an ancient orange-woman, making good his title in a very satisfactory way, and tosses the glowing fruit