It is worthy of notice, too, that the age of the trees found standing on these ancient fortifications and mounds, and the number of their annular circles, diminish with striking regularity in the ratio of their distance from the eastern coast. The first found reach as high a number as seven hundred; then, decreasing, they are found in Ohio with from four hundred to five hundred; and then in the copper regions of Lake Superior with from three hundred and fifty to four hundred annular rings. Comparing these figures with the time (1170) when Madoc and his followers landed on this continent, and allowing for their progress into the interior such reasonable periods as their peculiar circumstances demanded, adding also whatever other proofs have been adduced, scarcely a single doubt can linger in the mind of the candid inquirer as to the origin of these earthen defences and mounds, the removal of the native forests, the working of the mines, and the many relics unearthed. If it be objected that a small band of a few hundreds could not cover so much territory or accomplish so much work, it may be said, in reply, that one century alone offers sufficient time for the achievement of wonders. Under favorable conditions peoples multiply rapidly. Surrounded as the Welsh were with populous tribes of red men, they affiliated with some of them for self-protection and aid, and degraded remnants of them are found at the present time in different parts of the far West. CHAPTER VIII. THE DISPERSION OF THE WELSH INDIANS. It was only after the most stubborn and sanguinary resistance that the Welsh Indians yielded the fertile plains of the Ohio valley to their enemies. They moved down the Ohio River to its confluence with the Mississippi, and here for a period took another stand, as is evinced by the many remarkable remains and relics which have been brought to light by accident and the diligent researches of antiquarians and archæologists.