A few days after, the Niagara was joined by the Susquehanna, Captain Sands, which had been ordered from the Mediterranean to take part also in the expedition. She was a fit companion ship, being the largest side-wheel steamer in our navy, as the other was the largest propeller. Both together, they were worthy representatives of the American navy. When the Niagara arrived in the Thames, it was supposed she would take on board her half of the cable from the manufactory of Glass, Elliot & Co., at Greenwich; but on account of her great length, it was difficult to bring her up alongside the wharf in front of the works. This was therefore left to the Agamemnon, while the Niagara was ordered around to Liverpool, to take the other half from the works of Newall & Co., at Birkenhead, opposite that city. Accordingly she left Gravesend on the fifth of June, and reached Portsmouth the next day, where she remained a fortnight, to have some further alterations to fit her to receive the cable. Although she had been already pretty well "scooped out," fore and aft, the cry was still for room. Officers had to shift for themselves, as their quarters were swept away to make a wider berth for their iron guest. But all submitted with excellent grace. Like true sailors, they took it gayly as if they were only clearing the decks for battle. Among other alterations for safety, was a framework or cage of iron, which was put over the stern of the ship, to keep the cable from getting entangled in the screw. As soon as these were completed, the Niagara left for Liverpool, and on the twenty-second of June cast anchor in the Mersey. Here she attracted as much attention as in the Thames, being crowded with visitors during the week; and on Sundays, when none were received on board, the river-boats sought to gratify public curiosity by sailing round her. The officers of the ship were objects of constant hospitality, both from private citizens and from the public authorities. The Mayor of Liverpool gave them a dinner, the Chamber of Commerce another, while the Americans in Liverpool entertained them on the fourth of July--the first public celebration of our national anniversary ever had in that city.