Peter Kropotkin and John Thomas Bealby, 1911 Encyclopædia Britannica, Volume 23… (1911)
“ RIGA (Esth. Ria-Lin) , a seaport of Russia, 366 m. by rail S.W. of St Petersburg, the capital of the government of Livonia. The Gulf of Riga, 100 m. long and 60 m. in width, with shallow waters of inconsiderable salinity (greatest depth, 22 fathoms) , freezes to some extent every year. The town is situated at the southern extremity of the gulf, 8 m. above the mouth of the Dvina, which brings Riga, by means of inland canals, into water communication with the basins of the Dnieper and the Volga. ”
