That is Jean Clemens on the left and Clara in the middle.  Jean did not
return to Stormfield until after Isabel Lyon left in mid-April 1909. I
think the part in Clara's windblown hair is similar to the way she was
wearing it in the photo of her on this page

http://www.twainquotes.com/Clemens_Clara.html

No photos of Claude Beuchotte have yet been found for comparison to the
butler or servant in the film. Another possibility is Horace Hazen, but so
far no photos of him yet either.

Barb