Statistics for occurrence #1 of “Admiral Hichborn” in entry holland-submarine-torpedo-boat of Harper's Encyclopedia of United States History:
...uilt and operated a submarine boat late in the seventeenth century.
The second time she was submerged, it is reported that the hull was crushed by the weight of water.
In a report on the subject, Admiral Hichborn wrote:
If Day were really crushed in his boat, he has the unique distinction of being the only victim of the dangers of submarine navigation; but this distinction depends upon the supposition ...
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† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.