Ballet, help identify the author

[star777]

Help identify the author of these two pictures, it looks like a pencil, but not sure.
The paintings were purchased about 15 years ago.
About the artist did not know how and the value of these pictures, please tell me.

[Игорь Гурьев]

Hmm , no pint can not tell.
Signature strange : Charlot - and we ought to Charlotte, if it is a girl's name .
Although maybe such a name : Charlot ?

Technique? Maybe , mixed , black and white pastel with the addition of gouache ( hard to tell from the photo ) .

Execution time. 1910-1930 's?

Level . Srednezhelatelnogo below .

Value. Minimally symbolic .

School . It is possible that some provincial French artist , sketched a local ballet company.