The Daily Dispatch: December 18, 1860., [Electronic resource]

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Twenty-six millions of money in one pile.

--Four miles from Rockport, Indiana, on the Ohio river, there is a coal mountain which is now being extensively worked by three firms, owning as many different mines, and producing an article of coal of a very superior quality. The Democrat, of that place, has attempted an estimate of the wealth of the section, and sums it up in this intelligent manner:

Allowing the "knob" where the miners worked to cover two sections of thirteen hundred acres of land, we have but a small part of the area of the "knob locality. " A single acre gives an area of over three thousand square feet, and thirteen hundred acres of over thirty-six millions. The average depth of the "vein" exceeds five feet--Mr. Stevenson's vein being five feet and a half--and at five feet average, we have a cubical quantity of more than two hundred and eighty millions of feet. One foot of coal makes one and a fourth bushels in quantity, and the thirteen hundred acres gives three hundred and thirty millions of bushels. Allowing duly for coal slack and waste, three hundred and thirty millions of bushels, at eight cents per bushel, amounts to over $26,000,000. The county of Spencer is now valued at about $30,000,000.