It is a sad thing that this is happening, especially for the people who consult
it. the comparative search engine for african art http://yvra.library.yale.edu/ will be discontinued, it was a great tool to find objects and related objects on specific tribes and the related documentation.
The Official announcement of Yale:
NEWS OF THE ARCHIVE
ANNOUNCEMENT ON THE FUTURE OF THE YALE-VAN RIJN ARCHIVE OF AFRICAN ART
After many years, since the Yale University Art Gallery received the Guy van
Rijn Archive of African Art in 2001, we are planning to migrate the database to
the Yale University Library Digital Collections available for cross-collection
search by the Yale community of students, faculty, staff, and others who have
access to the Yale digital system. As of August 1, 2012, the website http://yvra.library.yale.edu/
will no longer exist.