Mapmaker for HMS Cicala reporting in. These are the stopping places I have located for the Russian Expedition gunboats.
Pliss [Plyoso] Lat 62.70, Long 43.31 on the Dvina River
Ust Vaga [Ust?-Vaga] Lat 62.74, Long 42.84 on the Vaga River
Gunners Bridge [near Kurgomen] Lat 62.6, Long 43.5 on the Dvina River (battle name for a local bridge)
All added to ref, map & csv. Thanks Janet!
For Gunners Bridge, the most plausible one should be the bridge across Undysh River, a couple of kilometers down the river from Kurgomen (no bridges across the Dvina River existed above Arkhangelsk for a great distance, just boat landings and crossings).
PS: On the HMS Cicala transcription, the Vaga river has been wrongly addressed as "Varga" (on the logpage it seems correct)