|Illustration published in Harper's Magazine shortly after the sinking.|
|The book discovered in Harrisburg.|
To give you a little background, here is the summary for the USS Tecumseh from the Naval History and Heritage Command website:
Tecumseh arrived off Mobile Bay on the evening of 4 August 1864. Shortly after 6 a.m. on 5 August, the 18-ship Union squadron crossed the bar at flood tide and moved into the bay with Tecumseh leading the van of monitors, which included USS Manhattan, USS Winnebago, and USS Chickasaw. The ironclads passed between the fortified headlands to starboard of the lightly-protected wooden steam frigates, taking the brunt of Confederate Fort Morgan's heavy guns. Just after 7 a.m., Tecumseh opened fire on the fort's batteries. Meanwhile, Confederate Admiral Franklin Buchanan's squadron, centered around the heavy ironclad ram CSS Tennessee, sortied to meet the attackers. When Tecumseh veered left to engage the Confederate ram, the Union monitor hit an underwater mine or torpedo. After a tremendous explosion, Tecumseh heeled over and sank rapidly with its captain and 92 crewmen. As Tecumseh rolled over, two shells fired from nearby Fort Morgan struck the sinking monitor.