One of these is embraced in the provision, "that 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."[295] The common law of England, which recognizes the right to the writ of habeas corpus for the purpose of delivery from illegal imprisonment or restraint, was the law of each of the American States; and it appears from the proceedings of the Convention to have been the purpose of this provision to recognize this right, in the relations of the people of the States to the general government, and to secure and regulate it. The choice lay between a declaration of the existence of the right, making it inviolable and absolute, under all circumstances, and a recognition of its existence by a provision which would admit of its being suspended in certain emergencies. The latter course was adopted, although three of the States recorded their votes against the exception of cases of rebellion or invasion.[296] The prohibition upon Congress to pass bills of attainder, or _ex post facto_ laws, came into the Constitution at a late period, and while the first draft of it was under consideration. Bills of attainder, in the jurisprudence of the common law, are acts of legislation inflicting punishment without a judicial trial. The proposal to prohibit them was received in the Convention with unanimous assent. With regard to the other class of legislative acts, described as "_ex post facto_ laws," there was some difference of opinion, in consequence probably of different views of the extent of the term. In the common law, this expression included only, then and since, laws which punish as crimes acts which were not punishable as crimes when they were committed. Laws of a civil nature, retrospective in their operation upon the civil rights and relations of parties, were not embraced by this term, according to the definition of English jurists. But it is manifest from what was said by different members, that, at the time when the vote was taken which introduced this clause into the Constitution, the expression "_ex post facto_ laws" was taken in its widest sense, embracing all laws retrospective in their operation. It was objected, therefore, that the prohibition was unnecessary, since, upon the first principles of legislation, such laws are void of themselves, without any constitutional declaration that they are so. But experience had proved that, whatever might be the principles of civilians respecting such laws, the State legislatures had passed them, and they had been acted on. A large majority of the Convention determined, therefore, to place this restraint upon the national legislature, and at the time of the vote I think it evident that all retrospective laws, civil as well as criminal, were understood to be included.[297] But when the same restraint came afterwards to be imposed upon the State legislatures, the attention of the assembly was