Soviet Government levying dues on foreigh vessels visiting Petrograd according to the Weekly Intelligence Summary No. 19 for the week ending 20 August 1921

An item referred to the intentions of the Soviet Government to levy heavy dues on foreign vessels visiting Petrograd [St. Petersburg, Russia] with port charges ten times as high as in 1914 and to be paid in foreign currency.

Source

The National Archives, Kew Gardens, England CAB-24-127-57