On the writer’s arrival at the work-yard this evening, he learned, with much regret, that an unfortunate accident had happened to one of the masons, of the name of Hugh Rose, while employed in raising a block of stone, of between two and three tons weight, with the carpenter’s jack, represented in Plate X. The jack had not been set with sufficient care, and slipped from under the stone, which instantly fell upon his knees. For a considerable time Rose was thus kept in a sitting posture, with a great part of the weight of this large stone resting upon his legs, till relieved by the other workmen who came to his assistance, and again applied the jack to raise the stone. His legs were, however, sprained in a very painful and distressing manner, which kept him from work for upwards of a twelvemonth. He was one of the best workmen in the Yard, and a man of great bodily strength; but became so much disabled by this accident, that the Light-house Board was afterwards pleased to settle an annuity of L. 20 _per annum_ upon him. [Sidenote: Friday, 19th.] [Sidenote: Granite Stones much wanted.] The work at this moment had much the appearance as if it would be retarded, as several blocks of stone were still wanted from the quarries at Aberdeen, to complete the Third entire course, the Second being now ready to be removed from the work-yard to the Rock. This course was 18 inches in thickness, the granite stones of which measured from 4 to 7 feet in length, varying in breadth from 3 feet to 4 feet 6 inches. Stones of these dimensions could not be landed with safety at high-water, but the railways on the Rock were nearly completed from the eastern landing-place to the site of the building, so that every thing was now in readiness for commencing the landing of the materials with low-water. [Sidenote: Wednesday, 24th.] [Sidenote: 10 Stones laid.] Having made all the necessary arrangements for making dispatch with the Third course, the writer sailed at mid-day on the 24th, with the Tender, for the Bell Rock, having on board forty-three persons in all, and the wind being favourable, the vessel was made fast to her buoy at the Rock at 7 P. M. The Smeaton also came to her moorings with a cargo of the Second course, when the landing-master’s crew brought the praam-boat along-side, and was loaded with 10 stones, which were landed, and laid this evening after three hours’ work. [Sidenote: Saturday, 27th.] [Sidenote: 136 Stones laid in 7 tides.]