The water broke into the Thames Tunnel with irresistible violence last night, about twenty minutes before seven o’clock. Some doubts of the soundness of the roof being entertained, Mr. Brunel, a week or two ago, made numerous borings, from which it was ascertained that the superincumbent soil was at the thinnest part about seventeen feet thick. At the moment that the water burst in, last night, there were luckily no persons in the tunnel but the workmen. The first indication of danger was a tremendous noise, and the rush of the water immediately followed. The men employed in the archway escaped with difficulty, but they did escape, and it is extremely gratifying that, on being mustered as soon after the accident as possible, not one was found missing.