Cyril put the specimens mainly watercolors are difficult to compare with the information I have work.
I found a few of his oil paintings .
According to the description work - Study Italian place ( many times he was and Italy ). there are similarities in writing trees ( seen a few oil paintings of Italy) , swabs, very similar (if we just oil)
Sitting looking in the archives and the various books and correspondence, trying to find a place in Italy ( of course if it is available)
Do not even know

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On this occasion, even patched bibliotekarskim Batanov