The boats landed this evening, when the artificers had again two hours’ work. The weather still continuing very thick and foggy, more difficulty was experienced in getting on board of the vessels to-night, than had occurred on any previous occasion, owing to a light breeze of wind which carried the sound of the bell, and the other signals, made on board of the vessels, away from the Rock. Having, fortunately, made out the position of the sloop Smeaton, at the N.E. buoy,--to which we were much assisted by the barking of the ship’s dog, we parted with the Smeaton’s boat, when the boats of the Tender took a fresh departure for that vessel, which lay about half a mile to the south-westward. Yet such is the very deceiving state of the tides, that although there was a small binnacle and compass in the landing-master’s boat, we had, nevertheless, passed the Sir Joseph a good way, when, fortunately, one of the sailors catched the sound of a blowing-horn. The only fire-arms on board, were a pair of swivels of one inch caliber; but it is quite surprising how much the sound is lost in foggy weather, as the report was heard but at a very short distance. The sound, from the explosion of gunpowder, is so instantaneous, that the effect of the small guns was not so good as either the blowing of a horn, or the tolling of a bell, which afforded a more constant and steady direction for the pilot. It may here be noticed, that larger guns would have answered better, but these must have induced the keeping of a greater stock of gunpowder, which, in a service of this kind, might have been attended with risk. A better signal would have been a bugle-horn, the tremulous sound of which produces a more powerful effect in fog, than the less sonorous and more sudden report of ordnance. [Sidenote: Friday, 24th.] The artificers landed to-day, both with the morning and evening tides. During the first, they had two hours and three-quarters, and in the latter, two hours and a quarter, making together five hours work; the weather still continuing thick and foggy, with the wind at south-east. [Sidenote: Saturday, 25th.] The boats landed this morning at a quarter from 8 o’clock, and the artificers left off work at half-past 10. During the evening’s tide, the operations were again continued with torch-light, from half-past 7 till 11 o’clock P. M., having to-day had four hours and three-quarters work upon the rock. [Sidenote: Force of the sea upon the Rock.]