[26] In order to give the reader some idea of the tremendous violence with which nature sometimes distinguishes the operations of the volcano in these regions, and enable him to form some conjecture, from the occurrences of recent experience, of the effects they may have produced in past ages, a short account of the extraordinary and wide-spread phenomena that accompanied the eruption of the Tomboro mountain, in the island of Sumbawa, in April 1815, may not be uninteresting. Almost every one is acquainted with the intermitting convulsions of Etna and Vesuvius, as they appear in the descriptions of the poet and the authentic accounts of the naturalist, but the most extraordinary of them can bear no comparison, in point of duration and force, with that of Tomboro. This eruption extended perceptible evidences of its existence over the whole of the Molucca islands, over Java, a considerable portion of Celebes, Sumatra, and Borneo, to a circumference of a thousand statute miles from its centre, by tremulous motions, and the report of explosions; while within the range of its more immediate activity, embracing a space of three hundred miles around it, it produced the most astonishing effects, and excited the most alarming apprehensions. On Java, at the distance of three hundred miles, it seemed to be awfully present. The sky was overcast at noon-day with clouds of ashes, the sun was enveloped in an atmosphere, whose "palpable" density he was unable to penetrate; showers of ashes covered the houses, the streets, and the fields to the depth of several inches; and amid this darkness explosions were heard at intervals, like the report of artillery or the noise of distant thunder. So fully did the resemblance of the noises to the report of cannon impress the minds of some officers, that from an apprehension of pirates on the coast vessels were dispatched to afford relief. Superstition, on the other hand, on the minds of the natives, was busily at work, and attributed the reports to an artillery of a different description to that of pirates. All conceived that the effects experienced might be caused by eruptions of some of the numerous volcanos on the island; but no one could have conjectured that the showers of ashes which darkened the air, and covered the ground of the eastern districts of Java, could have proceeded from a mountain in Sumbawa, at the distance of several hundred miles. Conceiving that it might be interesting and curious to preserve an authentic and detailed account of the information that could be gained of this wonderful phenomenon, while the event was still recent and fully remembered, I directed a circular to the different Residents, requiring them to transmit to the Government a statement of the facts and circumstances connected with it, which occurred within their own knowledge. From their replies, the narrative drawn up by Mr. Assey, and printed in the ninth volume of the Batavian Transactions,