As before intimated, petroleum was found in Venango County by the earliest white settlers, and was esteemed for its medical properties. But it was obtained only in minute quantities. It was found in particular localities along the banks of the Alleghany, issuing with the water from springs, and sometimes bubbling up from the bottom of the river in small globules, that rising to the surface, disperse themselves upon the water, and glide away in silent beauty.
The principal oil spring, or that from which the largest quantity of petroleum was collected, was located on Oil Creek, about two miles from its mouth. From this the main supply was drawn for the wants of the earlier inhabitants. And as the demand was limited, no great amount of enterprise was called forth in its production. The _modus operandi_ was most primitive, and yet withal the results were satisfactory.
A point was selected where the oil appeared to bubble up most freely, a slight excavation was made, and the oil suffered to collect. When a tolerable stratum of petroleum had collected on the top of the water, a coarse blanket was thrown upon the surface, that soon became saturated with the oil, but rejected the water. The blanket was then taken out, wrung into a tub or barrel, and the operation repeated.
But the demand was limited. Most families kept a supply for their own use. Yet, for ordinary purposes, a pint bottle was sufficient for a year's consumption. Indeed, half a dozen barrels were all that could be disposed of throughout the entire oil region of Western Pennsylvania up to a period when the researches of science were brought to bear upon its purification as an illuminator. Almost every good housewife was supposed to have a small store of Seneca oil, as it was popularly termed, laid by in case of accident, for the medication of cuts and bruises; and not even the most popular of the nostrums of the present day is so much relied on as was this--nature's own medicine--by the early settlers in these valleys.
In the mean time a well was bored on the bank of the Alleghany, within two miles of the mouth of Oil Creek, in quest of salt water, with a view to the manufacture of salt. This was some forty years ago. After sinking the well through the solid rock to the depth of seventy or eighty feet, oil presented itself in such quantities, mingled with the salt water, as to fill the miners with the utmost disgust, and induce them to abandon the well altogether. They were boring for salt, not for petroleum. Salt was an article of utility and large demand; oil was of comparatively small importance, and already a drug in the market, through the spontaneous yield of nature. Again, a well was dug in the town of Franklin, about thirty years ago, for the supply of a household with water. At the depth of thirty feet there were evident signs of petroleum, that were annoying to the workmen; and although the water of the well was used for culinary purposes, it always bore a trace of oil, and was absolutely offensive to those unaccustomed to it. A hole has since been sunk in this well through the rock, but the yield of oil has not been as great as in some other wells in the immediate neighborhood. In the cases cited above were strong hints of the existence of the treasure concealed in the rocks beneath, and even of the manner of obtaining it. It was in fact the treasure knocking at the door, and asking to be released, in order to contribute to human wealth and enjoyment.