Note 1 — Chapter XXXIX
Reading edition
: The Naval Annual for 1893 mentions two types of submarine boats, the Zédé and the Goubet, both belonging to the French navy, which had then been tried with success. The same work mentions no such vessels belonging to Britain, nor yet any prospect of her possessing one. The effects described here as produced by these terrible machines are little, if at all, exaggerated. Granted ten years of progress, and they will be reproduced to a certainty.—Author.