United Brothers of Friendship and Sisters of the Mysterious Ten
The United Brothers of Friendship, originally a benevolent order established in 1861 in Louisville, KY, had both freemen and slave members. The organization later became a secret society with more than 60,000 members in various U.S. states, Liberia, Canada, and the West Indies. This membership included females referred to as the Sisters of the Mysterious Ten.
Some issues of the publications from the Kentucky-based organizations include the following:
Proceedings of the annual session of the United Brothers of Friendship and Sisters of the Mysterious Ten, Grand Lodge of Kentucky, available at the Filson Historical Society
Ladies' book of the U.B.F.: initiatory ceremony, ritual, and lectures, available at the Filson Historical Society
Proceedings of the annual session of the United Brothers of Friendship and Sisters of the Mysterious Ten and Juveniles of Kentucky, available at the University of Louisville Libraries
Proceedings of the annual session of the Grand Temple and Juveniles of Kentucky, available at the University of Kentucky Special Collections Research Center
Proceedings of the annual session of the State Grand Temple of Sisters of the Mysterious Ten and Juveniles of Kentucky, available at the University of Kentucky Special Collections Research Center
Grand Lodge hand book: United Brothers of Friendship, Sisters of the Mysterious Ten, Juveniles of the State of Kentucky, available at the University of Kentucky Special Collections Research Center
Annual reports of the Grand Secretary and the Grand Treasurer of the State Grand Lodge of the U. B. F., S. M. T., P. M. C., R. H., and Juveniles of Kentucky, available at the University of Kentucky Special Collections Research Center
Quarterly report of the United Brothers of Friendship, available at the University of Kentucky Special Collections Research Center
Proceedings of the annual session of the Grand Lodge / annual session of the Grand Temple of the United Brothers of Friendship, Sisters of the Mysterious Ten, P. M. C., R. H. and Juveniles of Kentucky, available at the University of Kentucky Special Collections Research Center.
For more see History of the United Brothers of Friendship and Sisters of the Mysterious Ten: In Two Parts ; a Negro Order ; Organized August 1, 1861, in the City of Louisville, Ky," available as a free ebook at Google Books.