The Southstack islet is about thirty yards from the rock known as the Head; and on this the lighthouse was erected in 1809, under the direction of Captain Evans, of the Royal Navy. Its form is that of a round tower, the foundation of which is a hundred and forty feet, and the light two hundred feet above the sea--so that it embraces within its sphere the whole bay of Caernarvon. The approach by water to this remarkable sanctuary of human life is well calculated to make a lasting impression upon every visitor, and should never be omitted where a favourable opportunity is presented by the state of the weather. It is here that the extremes of natural desolation and human industry are brought into juxtaposition; where human enterprise has established an asylum amidst the ruins of nature, the war of waves, the wreck of tempests, to shed the "light of hope" over the heart of many a despairing mariner. Happily for the cause of humanity, vast efforts have been made, and are continually making, to diminish where they cannot entirely remove the dangers which have so long invested our native coast; and it is impossible to calculate the number of lives and the amount of merchandise which have thus been saved from imminent destruction. Much, however, still remains to be effected--much that is really practicable--and it is earnestly to be desired that the attention of Government should be constantly directed to those points on which the science of the engineer can be most beneficially employed. Holyhead in particular is still susceptible of vast improvements; and with the addition of a capacious outer harbour, sufficient to admit merchant-vessels and others of larger size than those now frequenting the port, it would speedily realize all that could be wished for by those most interested in the welfare of the place, and in the prosperity of trade. This is also a subject well deserving of attention on the part of the Admiralty; for, with proper accommodation, her Majesty's ships, in the event of a war, might be advantageously stationed at this port, so as to secure free intercourse, and serve as a protection to the coast, which is now in a defenceless condition and open to any attempt at hostile aggression. We are happy that this question has received the consideration of her Majesty's Government; and feel assured that the steps which are now making towards the accomplishment of so great a desideratum will ensure the grateful approbation of the public, and the increased prosperity of Holyhead.