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Rh difficulties of travel, no matter how rough." It has been said of her that "had she not been part of him, she would herself have been better known to fame."

Lyell published, in 1838, the Elements of Geology; but his books and papers are all either more or less expansions of the epoch-making Principles, or observations which extend and confirm the theories enunciated in it. He followed the ideas of Hutton, who said: "I take things such as I find them at present, and from these I reason with regard to that which must have been."

In 1834 he published two papers, "On the Proofs of the Gradual Rising of the Land in Certain Parts of Sweden," and "On the Cretaceous and Tertiary Strata of Zeeland and Moën," after paying a visit to Sweden and Denmark. Three years later he again visited Scandinavia; and in 1841 he spent a year in the United States and Canada, repeating the visit in 1845. These travels gave rise to numerous geological papers, and to two books: Travels in North America, published in 1845; and A Second Visit to the United States, in 1849. In these works he describes the American character and institutions, and his adventures in the land of liberty.

The same year that Louis Philippe abdicated, and the kingdom of Poland was absorbed in Russia, Germany, and Austria, Lyell was knighted, and sixteen years later, namely, in 1864, he received a baronetcy, but dying without