§2. It is generally known that, from an early period, slaves had been imported into the colonies from Africa. At the time when the constitution was formed, laws prohibiting the foreign slave trade had been passed in all the states except North Carolina, South Carolina, and Georgia. The delegates from these states in the convention insisted on having the privilege of importing slaves secured, by withholding from congress the power to prohibit the importation. A majority of the convention were in favor of leaving congress free to prohibit the trade at any time. But as it was doubtful whether these states would in such case accede to the constitution; and as it was desirable to bring as many states as possible into the union; it was at length agreed that the trade should be left open, and free to all the states choosing to continue it, until 1808, (twenty years;) congress being allowed, however, to lay a duty or tax of ten dollars on every slave imported. §3. It has ever been a cause of wonder and regret to many, that the traffic in human beings should have been permitted by the constitution, even for the most limited period. It is, however, a gratifying fact, that congress exercised its power for terminating the foreign slave trade, at the earliest possible period. A law was passed in 1807, to go into effect in January, 1808, making it unlawful, under severe penalties, to import slaves into the United States; and in 1820, the African slave trade was by law declared _piracy_, and made punishable by death. §4. The next clause is, "The privilege of the writ of _habeas corpus_ shall not be suspended, unless when, in cases of rebellion or invasion, the public safety may require it." _Habeas corpus_, (Latin,) signifies, _have the body_. A person deprived of his liberty, may, before the final judgment of a court is pronounced against him, petition a court or judge, who issues a writ commanding the party imprisoning or detaining him, to produce his body and the cause of his detention before the judge or court. If the imprisonment or detention is found to be illegal, or without sufficient cause, the prisoner is set at liberty. §5. The next clause declares, "No bill of attainder or _ex post facto_ law shall be passed." A _bill of attainder_ is an act of the legislature by which the punishment of death is inflicted upon a person for some crime, without any trial. If it inflicts a milder punishment, it is usually called a bill of pains and penalties. Such laws are inconsistent with the principles of republican government, and are therefore properly prohibited.