In the River Mersey on 6 November 1865, the Confederate warship, CSS Shenandoah, surrendered to HMS Donegal.
In 1864 and 1865, the ‘Shenandoah’ had sailed around the world, attacking Union merchant vessels.
Indeed, the reason why Captain Waddell chose to surrender to the British is that he feared that surrendering to the Union forces would lead to a charge of privacy.
The ‘Shenandoah’ is famous for firing the final shot of the American Civil War.
Here is a newspaper story from November 1865 that reports on the surrender of the ‘Shenandoah’.
Exeter and Plymouth Gazette – 10 November 1865
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http://www.britishnewspaperarchive.co.uk/viewer/bl/0000229/18651110/004/0002