The case centered around the interpretation of an act of Congress passed on June 13, 1812, which confirmed land claims in the Missouri Territory.
The Supreme Court had to determine whether this 1812 act constituted a "present operative grant" of the United States' interest in the disputed land.
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A key issue was whether the act only confirmed existing claims or if it actually granted new property rights to the inhabitants of St.
Louis and surrounding villages.
The Court had to analyze the specific language used in the 1812 act to ascertain the intent of Congress in passing it.
Arguments were made that the act was intended to resolve long-standing land disputes dating back to the time when the territory was under Spanish and French rule.
Extensive historical evidence from the period was likely presented to shed light on the context and purpose behind the congressional legislation.
The Court had to balance the property rights of the plaintiffs (Glasgow et al.) against the claims of the defendants (Hortiz et al.).
Precedents from prior Supreme Court rulings on land grant cases in the Louisiana Purchase territory were likely examined.
The case could have set an important precedent regarding the power of Congress to retroactively confirm land titles in newly acquired territories.
The ruling may have hinged on nuanced distinctions between the concepts of "confirmation" versus "grant" in the context of property law.
Given the age of the case (1861), the legal arguments likely reflected 19th century jurisprudence and interpretative approaches.
The outcome of the case could have had significant implications for land ownership and development in the Missouri region in the decades following the Louisiana Purchase.