Nowadays very little is thought of making a tunnel under the Thames, but the first one, designed and carried out by Sir Marc Isambard Brunel, was regarded, and rightly so, as a most wonderful feat of engineering. One was proposed in 1799, and a shaft was sunk in 1804, but the work went no further. The one now spoken of was approved by Act of Parliament 24 June, 1824, and the shaft was begun and the first brick laid on 2 March, 1825. It suffered several times from irruptions of water; one, on 18 May, 1827; another, in which six lives were lost, on 12 Jan. 1828. In 1837 there were two irruptions, the first taking place on 23 August, and it is thus described by one of Brunel’s assistants: “We were at work about two o’clock on Wednesday, when we found the water coming in faster than usual. At first, we observed a quantity of loose sand falling near the gallery, which changed to thin, muddy drops. This convinced us that the _stratum_ in which the men were working was bad, loose soil. The increase of water made it necessary to withdraw the men, which was done by a passage under the crown of the arch, made for their safety in case of accidents. No injury was sustained by any of the men. I was not satisfied, at the time, of the real extent of the bad soil, and I ordered a boat to be brought, with a rope of sufficient length to enable us to float to the shield. The boat was brought, but the rope attached to it, and by which we were to be hauled into the shaft, was shorter than we had ordered it. This deficiency probably saved our lives. We had not proceeded far in the boat when I perceived, by the twinkling of the lights in the tunnel, and other indications of inundation, that the waters came in with increased rapidity. I then gave the signal to be hauled into the shaft, and had scarcely done so when I observed the ground above give way, and the water descending in a thousand streams, like a cascade, or the Falls of Niagara. We were rescued, but, had the rope by which we were relieved from our perilous situation been of a length to allow the boat to go to the extremity of the tunnel, in all probability we should have been drowned. This happened about four o’clock, and, soon after five, the tunnel was entirely filled. No lives were lost. The only injury done is the suspension of the works. The steam engine, when the leak is stopped, will throw out a ton of water per minute; and, in three days and nights, the whole of the tunnel may be pumped dry.” The second irruption, on 3 Nov., also filled the Tunnel, but on this occasion one man lost his life. In the _Times_ of 9 Sep. of this year I find the first suggestion of a monument to Nelson, in Trafalgar Square: “Sir, I observe in your paper of Tuesday last, that a correspondent has commented upon the proposed plan for laying out Trafalgar Square.