Sentence:  And finally, in keeping with the argument "e silentio", one would be forced to conclude that the entire branch "P" of the "Paterik Skitskij" is of <WSD>Rusian</WSD> origin, i.e. that its chapters A–1 and B–G were added in <WSD>Rusian</WSD> translation to the body of chapters 2–22 and H–J transmitted in South Slavic manuscripts, so that the syntax, lexicon and morphology of the "Story of the Merciful Nestor" should be evaluated as <WSD>Rusian</WSD>. 
Meaning of the word marked with <WSD> tags:  from or related to the medieval state of Kievan Rus