Bernhardt films 1900-1923

[Moira Day]

Hi everyone,

I was looking into films made by Sarah Bernhardt between 1900 and 1923, 
and wondered if anyone knew where any extant copies of her films could 
be found or easily accessed.  I was particularly interested in her 1915 
film Mères Françaises (Mothers of France) in which she played Madame 
Jeanne D'Urbex a war widow in World War I. I understand that it was 
released in both English and French and reached an international 
audience.

Any help with this would be greatly appreciated. Thanks

Moira