What structure??

Reading up on the Ivanhoe, she was not a CSS (Confederate Steam Ship), she was a privately owned blockade runner owned by a William A. Boyle of London, registered in London, England.

And the drawing is a drawing of the Fergus and The Dare which were other Clyde-built blockade runners thought to be similar in design although built by a different builder (Alexander Stephens and Sons).

No pictures of the Ivanhoe are known to exist.

FWIW

Edit: I've spent more time than I should have looking for info on the Ivanhoe, but I did find one interesting fact. Another vessel, the Red Gauntlet (same gross and net tonnage) was built by the same shipbuilder (Scott & Co) and was trapped in Mobile Bay when the Battle of Mobile Bay commenced. The Red Gauntlet traveled up the Tombigbee to Gainesville where it was eventually surrendered to Union forces in June of '65.

If there are going to be any pictures of a vessel like the Ivanhoe, finding out what happened to the Red Gauntlet is a good bet, but I think I am done with it for now.

http://clydeships.co.uk/view.php?yea...vessel=IVANHOE

http://clydeships.co.uk/view.php?yea...l=RED+GAUNTLET