Illinois-Wabash Company

United Illinois and Wabash Land Company

Company type	Land company
Industry	Land speculation
Predecessor	Illinois Company, Wabash Company
Founded	1779
Area served	Illinois Country (British America, later United States)
Key people	William Murray, James Wilson, Robert Morris, Silas Deane, Samuel Chase, Thomas Johnson

The Illinois-Wabash Company, officially known as the United Illinois and Wabash Land Company, originated from the consolidation of the Illinois Company and the Wabash Company. Both entities were initially created to secure territory from Native American tribes within the Illinois Country, a region under British control since 1763. The Illinois Company acquired two substantial land parcels in 1773, followed by the Wabash Company’s purchase of two additional tracts in 1775.

Because the Royal Proclamation of 1763 prohibited private individuals from buying Native American lands, British authorities did not acknowledge these transactions. After hostilities began in the American Revolutionary War, representatives of Illinois-Wabash petitioned both Virginia, which claimed jurisdiction over the area, and the United States government for official recognition, but were unsuccessful. When the U.S. government subsequently took possession and resold these lands, the conflict culminated in a decision by the Supreme Court of the United States. In Johnson v. McIntosh (1823), the Court determined that private acquisitions of Native American land lacked legal validity under U.S. law, confirming federal ownership and invalidating Illinois-Wabash’s claims.

Land purchases and British rejection

During the mid-1700s, traders and land speculators sought to expand beyond the Appalachian Mountains into America’s interior. Groups such as the Ohio Company of Virginia pursued these opportunities, but escalating tensions between Britain and France led to the French and Indian War (1754–1763), halting expansion efforts. Following Britain’s triumph, the Crown issued the Royal Proclamation of 1763, which barred private land purchases from Native peoples to avoid conflict, reserving negotiation rights exclusively for royal agents.

By 1768, merchants based in Philadelphia had entered Illinois Country’s market, providing supplies to Native tribes and British military forces. In 1773, William Murray, acting as their representative, referenced the Camden-Yorke Opinion, which some interpreted as permitting private acquisition of Native lands. Based on this understanding, Murray’s group established the Illinois Company and secured two extensive land parcels from the Kaskaskia, Peoria, and Cahokia tribes on July 5, 1773.

British officials dismissed these acquisitions, clarifying that Camden-Yorke did not authorize private land purchases. In April 1774, Murray enlisted support from Lord Dunmore, then Royal Governor of Virginia, who agreed to endorse the venture in exchange for a share of profits. Together they formed the Wabash Company; on October 18, 1775, its agent purchased two tracts along the Wabash River from the Piankeshaw tribe (known as the 'Piankeshaw Deed'). However, Dunmore’s departure during the Revolutionary War left both companies without official backing for their claims.

Consolidation and U.S. government rejection

During wartime, British presence in Illinois Country was minimal. In July 1778, Colonel George Rogers Clark asserted Virginia’s claim over this territory based on colonial charters. By December, Murray notified Virginia’s legislature about land holdings maintained by both Illinois and Wabash companies. To enhance their lobbying power, these companies merged on March 13, 1779, creating the United Illinois and Wabash Land Company. Prominent investors included Founding Father James Wilson, financier Robert Morris, diplomat Silas Deane, jurist Samuel Chase, and Maryland’s governor Thomas Johnson.

Despite these influential ties, Virginia declined to recognize their land titles and established "County of Illinois" in November 1779. Consequently, the company redirected its efforts toward securing approval from the U.S. government amid disputes over western state borders. In 1784, Virginia relinquished its western claims to federal authority. Although appeals continued into the early 1800s, federal officials consistently refused to confirm their ownership rights, leading to a decline in company activity.

The United States obtained these territories through treaties negotiated by William Henry Harrison and commenced issuing land patents following the War of 1812. In 1820, an investor’s estate initiated legal action against William McIntosh regarding contested land transactions linked to earlier Native American deals. This dispute reached the U.S. Supreme Court in Johnson v. McIntosh (1823), which ruled that private purchases of indigenous lands were invalid under U.S. law, effectively terminating all claims by the company.

References

• Abernethy, Thomas Perkins. Western Lands and the American Revolution. First issued in 1937. New York: Russell & Russell, 1959 edition.
• Fish, Sidney M. "The Illinois and Wabash Claim" featured in Barnard and Michael Gratz: Their Lives and Times. Lanham, MD: University Press of America, 1984. Pages 155–178.
• Kades, Eric. "History and Interpretation of the Great Case of Johnson v. M'Intosh". Appeared in Law and History Review, Spring 2001 issue.
• Sosin, Jack M. The Revolutionary Frontier, 1763–1783. Published in New York by Holt, 1967.