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Rh with plague. The steady approach of cholera in 1831 was the last occasion in England of a thoroughgoing resort to quarantine restrictions. The pestilence invaded every country of Europe despite all efforts to keep it out. In England the experiment of hermetically sealing the ports was not seriously tried when cholera returned in 1849, 1853 and 1865–66. In 1847 the privy council ordered all arrivals with clean bills from the Black Sea and the Levant to be admitted to free pratique, provided there had been no case of plague during the voyage; and therewith the last remnant of the once formidable quarantine practice against plague may be said to have disappeared.

For a number of years after the passing of the first Quarantine Act (1710) the protective practices in England were of the most haphazard and arbitrary kind. In 1721 two vessels laden with cotton goods, &c., from Cyprus, then a seat of plague, were ordered to be burned with their cargoes, the owners receiving £23,935 as indemnity. By the clause in the Levant Trade Act of 1752 vessels for the United Kingdom with a foul bill (i.e. coming from a country where plague existed) had to repair to the lazarets of Malta, Venice, Messina, Leghorn, Genoa or Marseilles, to perform their quarantine or to have their cargoes “sufficiently opened and aired.” Since 1741 Stangate Creek (on the Medway) had been made the quarantine station at home; but it would appear from the above clause that it was available only for vessels with clean bills. In 1755 lazarets in the form of floating hulks were established in England for the first time, the cleansing of cargo (particularly by exposure to dews) having been done previously on the ship's deck. There was no medical inspection employed, but the whole routine left to the officers of customs and quarantine. In 1780, when plague was in Poland, even vessels with grain from the Baltic had to lie forty days in quarantine, and unpack and air the sacks; but owing to remonstrances, which came chiefly from Edinburgh and Leith, grain was from that date declared to be a “non susceptible article.” About 1788 an order of council required every ship liable to quarantine, in case of meeting any vessel at sea, or within four leagues of the coast of Great Britain or Ireland, to hoist a yellow flag in the daytime and show a light at the main topmast head at night, under a penalty of £200. After 1800, ships from plague-countries (or with foul bills) were enabled to perform their quarantine on arrival in the Medway instead of taking a Mediterranean port on the way for that purpose; and about the same time an extensive lazaret was built on Chetney Hill near Chatham at an expense of £170,000, which was almost at once condemned owing to its marshy foundations, and the materials sold for £15,000. The use of floating hulks as lazarets continued as before. In 1800 two ships with hides from Mogador (Morocco) were ordered to be sunk with their cargoes at the Nore, the owners receiving £15,000. About this period it was merchandise that was chiefly suspected: there was a long schedule of “susceptible articles,” and these were first exposed on the ship's deck for twenty-one days or less (six days for each instalment of the cargo), and then transported to the lazaret, where they were opened and aired forty days more. The whole detention of the vessel was from sixty to sixty-five days, including the time for reshipment of her cargo. Pilots had to pass fifteen days on board a “convalescent ship.” The expenses may be estimated from one or two examples. In 1820 the “Asia,” 763 tons, arrived in the Medway with a foul bill from Alexandria, laden with linseed; her freight was £1475 and her quarantine dues £610. The same year the “Pilato,” 495 tons, making the same voyage, paid £200 quarantine dues on a freight of £1060. In 1823 the expenses of the quarantine service (at various ports) were £26,000, and the dues paid by shipping (nearly all with clean bills) £22,000. A return for the United Kingdom and colonies in 1849 showed, among other details, that the expenses of the lazaret at Malta for ten years from 1839 to 1848 had been £53,553. From 1846 onwards the establishments in the United Kingdom were gradually reduced, while~ the last vestige of the British quarantine law was removed by the Public Health Act 1896, which repealed the Quarantine Act 1825 (with dependent clauses of other acts), and transferred from the privy council to the Local Government Board the powers to deal with ships arriving infected with yellow fever or plague, the powers to deal with cholera ships having been already transferred by the Public Health Act of 1875.

International Conventions.—Since 1852 several conferences have been held between delegates of the Powers, with a view to uniform action in keeping out infection from the East and preventing its spread within Europe; all but that of 1897 were occupied with cholera. No result came of those at Paris 1852, Constantinople 1866, Vienna 1874, and Rome 1885, but each of the subsequent ones has been followed by an international convention on the part of nearly one-half of the Powers represented. The general effect has been an abandonment of the high quarantine doctrine of “constructive infection” of a ship as coming from a scheduled port, and an approximation to the principles advocated by Great Britain for many years. The principal States which retain the old system are Spain, Portugal, Turkey, Greece and Russia (the British possessions Gibraltar, Malta and Cyprus being under the same influence). The aim of each international sanitary convention has been to bind the Powers to a uniform minimum of preventive action, with further restrictions permissible to individual States. The minimum is now very nearly the same as the British practice, which has been in turn adapted to continental opinion in the matter of the importation of rags.

