The eastern zone of the country doubtless furnishes the most interesting petroleum occurrences in England. Here, the interest does not so much depend upon the number of escapes, as upon the promising geological conditions subserving the production and possible retention of petroleum. According to the investigations of Dr. W. Forbes-Leslie, F.R.G.S., whose valuable contribution on the subject of the occurrence of petroleum in England forms one of the most important papers ever read before the Institution of Petroleum Technologists, the northern line of oil occurrences runs from Filey, north-westerly, the principal finds being located at Filey, Pickering, and Kirby Moorside. Oil, too, has been found at Brigg, in Lincolnshire, at Market-Rasen, Haugmont, and Donnington-on-Bain. The line of oil occurrences starts at King’s Lynn, on the Wash, and runs south-westwards as far as Cottenham, in Cambridgeshire, the principal occurrences being at King’s Lynn, Downham, Littleport, and Ely. The information obtained by the bore-hole at Kelham, to which I have already referred, is a factor of great value when taken into consideration and applied to an analytical review of the petroleum seepages in England. It is a positive proof that a true oil-bearing stratum underlies the surface rocks, at any rate, in one part of the British Isles, and, when it is considered in relation with the surface position of the oil escapes on the eastern flank of the Pennine Chain, it suggests a possible connection between those underground sources of oil and those surface escapes which are scattered, seemingly at such random, along the Pennines.