The U.S. Supreme Court case Citizens' Savings and Trust Company v. Illinois Central Railroad Company in 1906 revolved around a dispute over land ownership rights between the two parties involved. The Citizens' Savings and Trust Company claimed that they had acquired title to certain lands through foreclosure proceedings, while the Illinois Central Railroad argued that it held an easement on these same lands for railroad purposes under an 1850 federal statute granting such rights to states for public improvements. The court ruled in favor of the railroad company, stating that their easement was superior to any subsequent claim or encumbrance on the property because it originated from a federal grant intended for public use. Therefore, even though Citizens’ Savings and Trust may have obtained legal title through foreclosure, this did not extinguish or supersede Illinois Central’s pre-existing right of way granted by Congress.

In the dissenting opinion for Citizens' Savings and Trust Company v. Illinois Central Railroad Company, Justice Harlan disagreed with the majority's interpretation of the contract between Illinois Central Railroad (ICR) and Chicago Dock & Canal Co. He argued that ICR had not violated its agreement by constructing a new track on land it leased from Chicago Dock because this was within its rights as a lessee. Furthermore, he contended that even if there were ambiguities in the lease agreement, they should be resolved in favor of ICR due to public policy considerations; railroads are essential for commerce and their operations should not be unduly restricted by private contracts. Lastly, he criticized the majority's reliance on an 1880 case involving similar issues but different parties (Illinois Central R.R.Co.v.Illinois), stating that it was irrelevant to interpret current contractual obligations between two distinct entities.