New Mexico Territorial Laws and Treaties NM TERR LAWS KEARNY CODE CRIMES & PUNISHMENTS Art. III, § 13

In all cases of imprisonment for offenses under this law, it shall be lawful for the jailer to compel the prisoner to labor at some useful employment, under such directions and regulations as may from time to time be given by the judge of the court before whom the conviction was had, and it shall be lawful to secure such convicts by chains and blocks, or otherwise, so as to prevent their escape during the period of their imprisonment.