Blennerhassett Island, in the Ohio River, near Parkersburg, W.Va. On it Harman Blennerhassett built a mansion and a laboratory for his study. The island was ransacked by the local militia when Aaron Burr's schemes, with which Blennerhassett was connected, were declared traitorous by President Thomas Jefferson.
See N. F. Schneider, Blennerhassett Island and the Burr Conspiracy (1938).
More on Blennerhassett Island from Infoplease:
See more Encyclopedia articles on: U.S. Physical Geography