The pieces of evidence from the passage that best support the idea that Harborough does not consider the dangers that may be hiding in the ocean are:
- “The sea was, in a sense, absolutely smooth . . .”
- “The surface of that ground-swell was without a wrinkle, polished and glossy like lacquer . . .”
These statements emphasize the calm and smooth appearance of the ocean, suggesting that Harborough may be overlooking potential dangers lurking beneath the surface.