Farnsworth v. Territory of Montana was a Supreme Court case decided in 1895. The case involved a dispute between the Territory of Montana and the Farnsworth family over the ownership of a piece of land. The Territory of Montana had granted the Farnsworth family a homestead patent for the land in question, but the Territory later attempted to revoke the patent and take the land back. The Farnsworth family argued that the Territory had no right to revoke the patent, and the Supreme Court agreed. The Court held that the Territory had no authority to revoke the patent, and that the Farnsworth family was entitled to the land. The Court also held that the Territory had violated the family's due process rights by attempting to take the land without providing them with notice or an opportunity to be heard. The Court's decision established the principle that the government cannot take away property rights without providing due process of law.

In the case of Farnsworth v. Territory of Montana, Justice Field delivered a dissenting opinion in which he argued that the majority’s decision was wrong and should be reversed. He believed that the law in question did not violate any constitutional rights because it only applied to those who had been convicted of certain crimes and were then released from prison on parole or probation. Furthermore, he argued that such laws are necessary for public safety as they help ensure that individuals do not commit further offenses after being released from incarceration. Additionally, Justice Field noted that while some may view these laws as overly restrictive or oppressive, they are still valid exercises of police power by states to protect their citizens from harm. Ultimately, his dissent concluded with an argument against overturning this particular law due to its importance in protecting society at large.