Dr. James Mounsey, and Jonas Han-way, Esq., have given a particular account of these springs. Both gentlemen, by their travels, their residence in Muscovy, and their acquaintance with several people who have been upon the spot, have had great opportunities of becoming perfectly informed of every thing relating to the subject; and whose judgment and veracity may be depended on. Both their accounts agree, that on the western coast of the Caspian Sea, not far from the city of Baku, there is a large spot of ground, where, on taking off two or three inches of the surface of the earth, and then applying a live coal, and blowing, a flame immediately issues forth, without either burning the reed or paper, provided the edges be covered with clay. This method supplies the want of candle in their houses. Three or four of these will also boil water in a pot, and they dress their victuals in this way. The flame may be blown out like that of a lamp, but otherwise it continues burning; it smells somewhat sulphureous, or rather like naphtha, but very little offensive. The ground is dry and stony, and the more stony the ground, the stronger and clearer the flame. Near this place they dig out brimstone, and here are also the naphtha springs. But the chief place for naphtha is Swieten Island, a small tract of land on the western coast of the Caspian Sea, and uninhabited, except at such seasons as they fetch naphtha from thence, which the Persians load in their wretched embarkations, without barrels or any other vessels, so that sometimes you see the sea covered with it for leagues together. The springs boil up highest in thick and heavy weather, and the naphtha sometimes takes fire on the surface, and runs lighted or burning into the sea in great quantities, and to great distances. In clear weather, it does not bubble above two or three feet. People make cisterns near the springs, into which they convey what overflows by troughs, taking off the naphtha from the surface, under which there is a mixture of water, or some other heavier fluid. The greater part is of a dark gray colour, very, unpleasant to the smell, but used in lamps by the poorer sort. There are also springs of black naphtha, which is thick, and in distillation grows not clear, but yellow; but the most valuable is the white naphtha, which is naturally clear and yellowish, and bears a great price. The Russians drink it as a cordial, but it does not intoxicate: it is used externally in paralytic disorders, and is carried into India as a great rarity, where they make with it the most beautiful and lasting Japan that has ever yet been known.

What the Indians call the Everlasting Fire, lies about ten English miles north-east-by-east from the city of Baku, on dry rocky ground. There are several ancient temples, built with stone, supposed to have been all dedicated to Fire: most of them are low arched vaults, from ten to fifteen feet high. Amongst the rest, there is a temple in which the Indians now worship; near the altar, about three feet high, there is a large hollow cave, from the end of which issues a flame, in colour and gentleness, not unlike a lamp that burns with spirits. The Indians affirm that this flame has continued burning some thousands of years, and believe it will last to the end of the world; and that if it was resisted or suppressed in this place, it would rise in some other. By the number of temples, it is probable there were formerly a great number of worshippers of fire, as well Indians as Persians: they are called Gouers. At present there are about twenty persons, who reside there constantly, and go almost naked. In summer it is very hot; and in winter they dwell within doors, and keep what fire they please, in the manner above described: they live upon roots and herbs for the most part, and are supposed to attend as mediators for the sins of many who are absent; and by their applications to this fire, in which the Deity is supposed to be present and visible, they atone for the sins of others. A little way from the temple just now mentioned, near Baku, is a low cliff of a rock, in which there is a horizontal gap, two feet from the ground, between five and six long, and about tree feet broad, out of which issues a constant flame, much of the colour mentioned already, being a light blue. It rises sometimes eight feet high, but is lower in still weather. They do not perceive the rock waste in the least. This also the Indians worship, and say it cannot be put out. About twenty yards on the back of this cliff is a well, and a rock twelve or fourteen fathoms deep, with exceedingly good water.