On May 19, 1759, the Cossack Trohim Chumak declared to the military office that last year he had traveled to the Crimea with the janissary Ostap, a resident of Perekop. They traveled in two dubs (feluccas) loaded with a cargo of grain that the janissary had bought in the Zaporozhian Sich. The cargo included 30 chetvert (1 chetvert = 2,099 kg) of rye flour, 15 barrels of millet, and 22 barrels of wheat flour.