Summing up briefly the chief provisions of that Act, which are given _in extenso_ elsewhere,[8] it will be seen that--(_a_) The master of a vessel arriving from a foreign port is to declare in writing to the chief officer of the Customs at the port of arrival, the number of the aliens who are on board, or have landed from his vessel; and to give the names, rank, occupations, and description of such aliens, so far as he shall be informed thereof; and if a master omits to make such declaration, or wilfully makes a false one, he is liable to a penalty. (_b_) Every alien on arrival is to declare in writing to the chief officer of Customs at the port of debarkation, his name, description, etc., and every such officer is to register the declaration, and deliver to the alien a certificate, which is to be given up to the chief officer of customs at the port of departure, when the alien leaves the country. (_c_) The chief officer of Customs at every port is to transmit to one of Her Majesty's principal Secretaries of State--in practice the Home Secretary--a copy of the master's declaration, a copy of the certificate given to the alien, and the certificate which the alien gives up on leaving the country. This sounds all very well in theory, and there is no doubt that if the provisions of the Act were carried out to the letter, we should be in possession of what we have not now--actual statistics, which must precede legislation. But the question is, what about the practice? Mr. Lindsey, the chief of the Long-room at the London Custom-house, told the Immigration Committee in 1888 that the Act had long since fallen into desuetude; and that only at the ports of London and Hull did the masters of vessels, at that date, report the number of aliens on board, or make any declaration whatever, while no means at all existed for checking the lists supplied. Indeed, it would be quite possible, he considered, for vessels to land "thousands of aliens" without the Customs authorities being able to find it out. No declarations were made or certificates given to aliens on arrival, or received from them on departure, as directed by sec. vi. of the Alien Act of William IV. It is evident, therefore, that up to that date the Act had been allowed to become practically obsolete.