The nearest Hansa Kontor was at Tarbatu (Dorpat / Tartu ). Jurjev was not the original Tarbatu, but an Kyva (Kijev) wooden fort which existed near Tarbatu in 1030-1061. 
 It was conquered and burned by the Ugandis (Aesthis) in 1061 and was never rebuilt again. 

 Also the Ghirla´s claim of Novgorodians contolling the trade in Gulf Of Finland is strange. 
 Why the Orthodox Churches in Vuojonmaa / Gotland (of which I have never seen an old Slavonic name) appear only in Russian sources, not mentioned by any others who really traded in Baltic Sea during the period before the Mongol Invasion in 1237.