Statistics for occurrence #1 of “Captain Cowper Coles” in part 13.51, chapter 13.52 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War: The Opening Battles. Volume 1.:

...d been found defective, and had been rejected. In 1854 Captain Ericsson had submitted to the Emperor Napoleon III. a design of an iron-clad battery with a hemispherical turret. In the next year Captain Cowper Coles , R. N., had suggested a vessel in the form of a raft with a stationary shield for protecting the guns; and in 1859 he had improved upon this design by adding a revolving cupola. But it was left to ...
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