After studying the reports of Florence Cook, the science historian Sherrie Lynne Lyons wrote that the alleged spirit "Katie King" was Cook herself and at other times an accomplice.
Despois de estudar os informes sobre Florence Cook, a historiadora da ciencia Sherrie Lynne Lyons escribiu que o suposto espírito de "Katie King" era a mesma Cook e noutras ocasións unha cómplice.