The U.S. Supreme Court case Enrique Del Pozo Y Marcos et al. v. Wilson Cypress Company in 1925 revolved around a dispute over land ownership in Florida, involving Spanish Land Grants that were protected under the Treaty of Adams-Onis (1819). The plaintiffs, heirs of Don Juan De Entralgo who was granted these lands by Spain before Florida became part of the United States, claimed they had rights to certain properties currently owned by Wilson Cypress Company due to this treaty's protection clause for pre-existing grants. However, the court ruled against them on two main grounds: firstly because their claim wasn't filed within six months after receiving notice from Congress as required; and secondly because there was no sufficient evidence showing that Don Juan de Entralgo ever received such grant or took possession of said lands during Spanish rule.

The dissenting opinion in the case of Enrique Del Pozo Y Marcos et al. v. Wilson Cypress Company argued that the majority's decision was based on a misinterpretation of Florida law and an overreach into state jurisdiction. The dissenters believed that under Florida law, the plaintiffs had a valid claim to ownership of submerged lands, contrary to what the majority held. They also contended that it was not within federal purview to decide issues related strictly to state property laws unless there is clear violation of constitutional rights or federal statutes involved - which they did not see as being applicable in this case. Therefore, they felt that this dispute should have been left for resolution by Florida courts rather than decided at Supreme Court level.