During a year spent studying emigration and immigration conditions in thirteen countries in Europe, it became necessary to familiarize myself with the situation in each country, so as far was practicable.
I found it was most difficult to get the data required. Many different languages were involved and the laws and regulations in some of the countries were contained in widely scattered statutes, Government decrees, and police regulations.
In many instances it was only through the courtesy and disinterested kindness of Government officials, Ambassadors, attaches, of embassies, and consular representatives that it was made possible to secure an intelligent idea of the situation.
To these gentlemen and to others who were most kind
I wish to express my appreciation and obligation. Believing that
some of the data would be of value to the many now interested
in these topics, and, indeed, even necessary for an understanding
if the international situation, and knowing of no work containing
the same, I have ventured to gather in book form some of the material
secured, which I hope will prove useful to those who are called
upon to legislate, discuss, or write about the subject.
James Davenport Whelpley
London, February 13, 1905