Illustration from a book depicting children pointing out the top of a submarine off the coast of Dover. Submarines were put into widespread use during the early 20th century.

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Size: 4168px × 5032px
Location:
Photo credit: © Photo12/Ann Ronan Picture Library / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 20th, boat, boatman, book, century, children, cliffs, comic, dover, engineering, illustration, naval, navy, seagulls, submarine, technology, wealth, white