When may this right of having a writ of Habeas Corpus, which belongs by the Constitution to every citizen, be suspended?

Only in cases of rebellion by our own citizens, or invasion by a foreign enemy; wherein the public danger is so great as to require prisoners who would otherwise be afforded this right, to remain in detention until this exceptional state of great potential danger has passed. As soon as it actually has passed, the right of Habeas Corpus must be immediately restored.