This map shows the spread of Cholera within European Russia. The main river systems are shown and labeled, and it is from this that we can see that the first incursion into European Russia happened in the lower stretches of the Don and Volga Rivers. The next areas to be affected are the upper stretches of the same rivers.
By the second half of July shows the first evidence of the disease travelling more quickly by rail, since in the same two weeks not only was Moscow affected, but non-contiguous portions of Russia were affected. St. Petersburg was affected within the same two weeks because of its direct rail link with Moscow, and it was not until August that Tver and Novgorod, which lie between Moscow and St. Petersburg, were infected.
From this map we can also see that Archangel, which at this point did not have a direct rail link with the rest of European Russia, was spared completely. Other territories that were spared are Estland, Kovno, and Vitebsk. By Autumn 1892, the disease had slowed its spread considerably.