[Sidenote: Saturday, 19th.] [Sidenote: Preparations for erecting them.] The weather to-day did not prognosticate any thing very favourable; the wind, though in light breezes, continued at NE., and it was occasionally almost calm. The main beams of the Beacon were made up in two separate rafts, fixed with bars and bolts of iron. One of these rafts, not being immediately wanted, was left astern of the floating-light, and the other was kept in tow by the Smeaton, at the buoy nearest to the rock. The Light-house Yacht rode at another buoy, with all hands on board that could possibly be spared out of the floating-light; including also ten additional men, as carpenters, smiths and sailors, brought off for this operation. The party of artificers and seamen which landed this morning on the Bell Rock, counted altogether forty in number. At half-past 8 o’clock, a Derrick or mast of thirty feet in height, was erected and properly supported with guy-ropes, for suspending the block for raising the first principal beam of the beacon; and a winch-machine was also bolted down to the rock for working the purchase-tackle. The necessary blocks and tackle were likewise laid to hand and properly arranged. The artificers and seamen were severally allotted in squads to different stations; some were to bring the principal beams to hand, others were to work the tackles, while a third set had the charge of the iron-stanchions, bolts, and wedges, so that the whole operation of raising the beams, and fixing them to the rock, might go forward in such a manner that some provision might be made, in every stage of the work, for securing what had been accomplished, in case of a change of weather. Upon raising the derrick, all hands on the rock spontaneously gave three hearty cheers, as a favourable omen of our future exertions in pointing out more permanently the position of the rock. Even to this single spar of timber, could it be preserved, a drowning man might lay hold. When the Smeaton drifted on the 2d of this month, such a spar would have been sufficient to save us, till she could have come to our relief. These preparations for the erection of the Beacon having been previously made, the writer collected the heads of the several departments on board of the Light-house Yacht, particularly the foremen of the builders and joiners, and the masters and mates of the vessels. Here the operation of raising and fixing the first four beams was again talked over and arranged, as, from the very limited period of working on the rock, every thing required to be performed in the most prompt and systematic manner, as previously settled. [Sidenote: Sunday, 20th.] [Sidenote: Four of the principal beams erected.]