What did foreign observers note about russia in terms of its size and population density

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The observers said that Russia was really large with heavy population density.
The nation filled with many trade centers, docks, churches, schools, manufacturing companies, tourist attractions, warehouses, academy, etc. As far as the observer's could see, Russia is one big impregnatable fortress for its potential invaders

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Bis the answer to this question

After spending all that time on the research then by all means modify the hypothesis or aim by reporting such. for example the findings did not bring forth what was expected but brought about different yet interesting findings worth exploring so the hypothesis is changed to reflect this new findings.

i may be way off but.