1866 Civil Rights Act 14 Stat. 27-30, April 9, 1866 A.D. CHAP. XXXI. An Act to protect all Persons in the United States in their Civil Rights, and furnish the Means of their Vindication.
The state of Rhode Island is 1,545 square miles in total. This includes 500 square miles of water (including small bays and inlets), as well as 1,045 square miles of land.
Actually, it's not quite Rhode Island, which covers about 1,200 square miles. But the smallest state has only five counties, while Waggoner Ranch occupies parts of six. From there, Waggoner's stats get more impressive.