About a mile and a half south-east of Hayle is _Huel Alfred_, which was some years ago one of the richest and most profitable Copper mines in the county. The adventurers gained a clear profit of nearly £130,000 during the period in which it was wrought. In the year 1816, from various causes, this mine was stopped, but about six months ago a company of London gentlemen embarked in the concern, and commenced their operations in a very spirited manner. Before Midsummer 1824, they expect to set at work two steam-engines with cylinders of the immense size of 90 inches in diameter, and one of less dimensions. This mine will undoubtedly prove attractive and interesting to the mineralogist, as, during the last period of working, several curious and rare minerals were discovered, as _Stalactitic_, _swimming_, and _cubic quartz_; _carbonate_, and _phosphate of Lead_; _stalactitic_, _botryoidal_, and _investing Calcedony_, &c. The lodes of this mine are so large that should the stranger intend to visit the interior of the earth, he cannot select a better opportunity. About a mile east of _Huel Alfred_ are situated the _Herland Mines_, which, after an interval of twenty years, have been lately set at work again. The adventurers in these mines are also principally London capitalists, who have erected two steam-engines of which the cylinders are 80 inches in diameter. The mineralogist will not fail to visit mines which were celebrated for the beautiful specimens of _Native Silver_, _Vitreous Silver ore_, and _black oxide of Silver_, found there during the last period of its working, an account of which, by the Rev. M. Hitchins, was published in the Philosophical Transactions for the year 1801. There is a remarkable contrast between the lodes of _Huel Alfred_ and those of _Herland_. The former being few, but very large; the latter, small but very numerous, and the ore peculiarly rich. The stranger may now proceed to Redruth, between which place and Hayle, there is a regular line of rich Copper mines, but as we propose to examine this metalliferous district in a future excursion, we shall return by _Saint Erth_ to Penzance. The desolate and barren appearance of the country in the neighbourhood of Hayle Sands, is much relieved by the woodland scenery of _Trevethoe_, the seat of the family of _Praed_; the father of the present possessor first introduced the _Pineaster Fir_, as a nurse for the growth of forest trees, and the estate of Trevethoe, as well as many others in the county, affords a striking evidence of the expediency of the plan. To the same gentleman we are indebted for the introduction of the _Arundo arenaria_, above mentioned.