In 1845, Lyell published his "Travels in North America, with Geological Observations," and in September of the same year, returned again to our country, spending nine months in travel and study, and bringing out later, in 1849, his "Second Visit to the United States of North America."

Already his "Elements of Geology" had appeared, which went through several editions. A seventh edition of the "Principles" had been published. He had also been knighted by the Queen, for his rare scholarship. Honored at home and abroad, working ardently and earnestly, often with failing sight, he had already won for himself the eminence of which he had dared to dream years before.

Of course he was welcomed at all great gatherings. Macaulay and Hallam, Milmore and Mrs. Somerville, Rogers, and scores of others were often at his home.

In 1851, he was appointed one of the Royal Commissioners for the first Great Exhibition held in Hyde Park, London, and a year later gave a second course of lectures at the Lowell Institute, Boston. So kindly and cordially had he written concerning us and our country, that he received the heartiest welcome. He had carried out in his life what he wrote to beautiful Mary Horner, twenty years before: "I hope we shall both of us contrive to cultivate a disposition—which David Hume said was better than a fortune of one thousand pounds a year—to look on the bright side of things. I think I shall, and I believe you will." The sweet-natured and great-minded man had looked on the bright side of America, and seen the good rather than the evil. He believed in our future. When Prescott died, to whom he was devotedly attached, he said: "From such a soil and in such an atmosphere, great literary men must continue to spring up."

All through our Civil War, he had known and loved us so well, that he was, like John Bright, our constant advocate. He deprecated the course of some of the English newspapers. "The integrity of the empire," he said, "and the non-extension and for the last two years the extinction of slavery constitute to my mind better grounds for a protracted struggle than those for which any war in our time, perhaps in all history, has been waged.... I am in hopes that the struggle in America will rid the country in the course of twenty years of that great curse to the whites, slave labor, and, if so, it may be worth all it will cost in blood and treasure...."

"Had the States been dismembered, there would have been endless wars, more activity than ever in breeding slaves in America, and a renewal of the African slave-trade, and the future course of civilization retarded in that continent in a degree which would not, in my judgment, be counterbalanced by any adequate advantage which Europe would gain by the United States becoming relatively less strong.... I believe that if a small number of our statesmen had seen what I had seen of America, they would not have allowed their wishes for dismemberment to have biassed their judgment of the issue so much."

In 1853, at the request of his government, he came to New York, as one of the commissioners to the International Exhibition. Of course, now, wherever he travelled, either in Europe or America, he met the distinguished, and was honored by them. He was the friend of Berzelius, the noted chemist of Sweden, and of the great Liebig of Germany. Professor Bunsen of Heidelberg said, that all his taste for geology had been derived from Lyell's books.

During the next few years, he was much in Holland, France, and Germany, preparing for the publication of another great work in 1863, the "Antiquity of Man." He had made a careful study of the ancient Swiss Lake-dwellings, erected on piles in the midst of the water, connected with the land by bridges. On Lake Neuchâtel it is estimated that there were more than forty such circular houses. At Wangen, near Stein, on Lake Constance, it is believed forty thousand piles were used. Some five thousand objects have been found, comprising flax, not woven, but plaited; carbonized wheat, and the bones of the dog, ox, sheep, and goat. The arrow-heads, hatchets, and the like, belong to the stone age, which geologists place, at the least, seven thousand years ago. At Zurich one human skull was found belonging to this early stone age. No traveller should pass through Zurich without seeing these memorials of a people who lived in the dawn of civilization, when the world was being made ready for the more perfect man.

Lyell had studied also the Danish "kitchen-middens," familiar to those who have been carefully over the museums at Copenhagen. These shell-mounds, the refuse heaps of this ancient race, are sometimes one thousand feet long and two hundred wide. As far back as the time of the Romans the Danish isles were covered with magnificent beech forests. In the bronze age there were no beech trees, but oaks. In the stone age the Scotch fir prevailed, and thousands of years must have elapsed while these giant forests succeeded each other.

The delta and alluvial plain of the Mississippi Lyell found to consist of sediment covering an area of thirty thousand square miles, several hundred feet deep. Taking the amount deposited annually, it would require from fifty to one hundred thousand years to produce the present deposits.