In the Empire State-Idaho Mining and Developing Company v. Hanley case in 1906, the U.S Supreme Court ruled on a dispute over mining rights. The plaintiff, Empire State-Idaho Mining and Developing Company, claimed that it had acquired ownership of certain mining claims through foreclosure proceedings against their original owner who had defaulted on his mortgage payments to them. However, defendant Hanley argued that he held valid title to these same claims based on an earlier purchase from the defaulting debtor before the foreclosure took place. The court found in favor of Hanley because under Idaho law at that time (which was applicable as per federal statute), a mortgage did not convey any interest in real property but merely provided security for debt repayment; thus it could not be foreclosed upon like other types of liens or encumbrances which would extinguish all junior interests including those acquired by bona fide purchasers such as Hanley.

The dissenting opinion in the case of Empire State-Idaho Mining and Developing Company v. Hanley argued that the majority's decision to uphold a lower court ruling, which found in favor of Hanley, was incorrect. The dissent contended that there were significant errors made by the trial court regarding jury instructions on key issues such as contract interpretation and damages calculation. These mistakes, according to the dissenting justices, unfairly prejudiced Empire State-Idaho Mining and Developing Company’s defense against Hanley's claims for compensation due under an alleged agreement between both parties related to mining operations. They believed these errors warranted a reversal of judgment or at least a new trial where proper legal standards could be applied correctly.