Authorship of the drawings, O. Braz?

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I hope for your professional help and advice.
Figure 1.2, presumably O. Braz (1873-1936)
2.vypolneny pencil on paper, paper with water marks, England, 1906
3.Risunki subscription worth 29.03.1909g date, and presumably the author of the attributive OB (See drawing and painting Braz)
4.Na figure for certain shows Stanislavsky and his wife MP Lilina.
5.Razmer figures about 35H25 see
6.100%reliability of the source of origin of the family of Stanislavsky.
7Dopolnitelnaya information for determining authorship: showing pictures to art of the Pushkin Museum - the first impression said that is very similar to OE Braz
(Reference: Braz OE, portraitist, has written to order the Tretyakov Gallery for its world-famous and unique in one's lifetime portrait of Anton Chekhov)
Compared female portrait Braz with my drawings, engineering images of a female hands are very similar.
Spent his little historical research - documented learned where he was and what was happening in the life of Stanislavsky in the day, which is dated the 2 drawing.
From a letter to Stanislavsky March 31, 1909 that it was all those days on tour in St. Petersburg (to give performances Three Sisters and The Blue Bird) to attend the performances Veal Prince Constantine Konstantinovich.
March 29 falls on a Sunday and holiday Pashi.No about what happened that day and who could draw them a word.
After 7 days, Stanislavski writes that he was invited to Tsarskoe Selo, where the present Emperor, and where was the show, which played all the same carried. Prince Constantine Konstantinovich.Posle Performance
Botkin and Diaghilev staged a dinner to which were invited, as Stanislavsky wrote a lot of artists, including Benoit, Dobuzhinsky, Roerich, et al Brazee word.
Here almost all the known circumstances, except for one (it I will not describe, unless the attribution "Brazovskii" may have some relation to the signature, Braz.
Thank you for your interest and help and waiting for your opinions.