Nikolay Nikolaus has just posted a number of wonderful old images, photos, sketches, paintings etc., of
Fort Ross on the
"Friends of Fort Ross" Facebook. It does look like you have to be logged in on Facebook to access their page, unfortunately. Here are a few of the images.
A number of photos from 1886 are linked to here
http://content.cdlib.org/ark:/13030/tf487007v0/
See also earlier posts
Annual Pilgrimage and Picnic at Fort Ross, May 31 and
Fort Ross 2012 Bicentennial