The following advertisement was, in March, 1885, inserted in The Religio-Philosophical Journal, of Chicago, The Banner of Light, in Boston, and The Public Ledger, in Philadelphia:

"THE SEYBERT COMMISSION FOR INVESTIGATING MODERN SPIRITUALISM," of the University of Pennsylvania, hereby requests all Mediums for Independent Slate Writing, and no other at present, who are willing to submit their manifestations to the examination of this Commission, to communicate with the undersigned, stating terms, etc.

HORACE HOWARD FURNESS,      
Acting Chairman,      
Philadelphia, Pa.