Of course Wilson's book was unscientific to a degree, with its Phoenician theories, its estimate of Spanish sources of information, and its assorted ignorance of many things. Its author, had, however, stumbled upon a bit of truth which no ridicule could shake, and which proved fruitful in suggestion to a very different kind of investigator. This was Mr. Lewis Henry Morgan, an important name in the history of American ethnological study. As a young man Morgan had felt an interest in the American Indian, which developed into a very unusual enthusiasm. It led him ultimately to spend a long time among the Iroquois, studying their tribal organisation and social phenomena. He embodied the knowledge so obtained in a book entitled _The League of the Iroquois_,[43] a truly epoch-making work, though the author himself was at the time wholly unaware of its far-reaching importance. This book described the forms of government, the social organisation, the manners and the customs of the Iroquois, with great accuracy and thoroughness. Seven years later, Morgan happened to fall in with a camp of Ojibway Indians, and found to his astonishment that their tribal customs were practically identical with those of the Iroquois. While this coincidence was fresh in his mind, Morgan read Wilson's iconoclastic book on Mexico. The suggestion made by Wilson that the Aztec civilisation was essentially the same as that of the northern tribes of Red Indians did much to crystallise the hypothesis which has now been definitely established as a fact.