Ringworld confusion

Having just re-read Ringworld Engineers for the umpteenth time,
something continues to confuse me. The maps of Earth, Mars and Kzin...
try as I might, I cannot find any clear reference to them in the
original novel. There's a vague mention of the "spheres of earthlike
worlds" (what? Mars?) but at no point can I find any of the crew
spotting the maps in the great ocean... and certainly, the Hindmost's
claim that they made the journey beneath the maps in Liar seems a bit
off.

Anyone able to offer any clarification?

Bad Horsey wrote:

> Having just re-read Ringworld Engineers for the umpteenth time,
> something continues to confuse me. The maps of Earth, Mars and Kzin...
> try as I might, I cannot find any clear reference to them in the
> original novel. There's a vague mention of the "spheres of earthlike
> worlds" (what? Mars?) but at no point can I find any of the crew
> spotting the maps in the great ocean... and certainly, the Hindmost's
> claim that they made the journey beneath the maps in Liar seems a bit
> off.
>
> Anyone able to offer any clarification?

Do you mean in _Ringworld_? In "The Map Room," p. 219. I don't believe
they identify them by the names "Map of Earth," etc., but they do
recognize that they appear to be two-dimensional projections of maps of
spherical worlds, although they don't guess their scale at the time.

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