Given to them by the King, or by the Declaration of Independence? Because if you say given to them by the Declaration of Independence, I must inform you that's who gave it to the Southerners too.
If given by the King, it's abrogated anyways, again, by the Declaration of Independence.
No, given to them by the State of South Carolina in 1836: "Resolved, That this state do cede to the United States, all the right, title and claim of South Carolina to the site of Fort Sumter and the requisite quantity of adjacent territory"