Pavel Zakharovich Vinogradov-Nikitin

Doctor in Agriculture, dendrologist, chairman of All-Russian arborist union, member of Caucasian Section of Imperial Russian Geographical Society, managing director of Borjomi estate since 1895 to 1918. Probably was a guide of S.M. Prokudin-Gorsky during filming in Borjomi, as he can be seen on multiple images (and also he took a photo of S.M. Prokudin-Gorsky himself).