"In the case of all other religions there is one main underlying difficulty, namely the difficulty of saying where Hinduism begins or ends, for all these religions represent either off-shoots from Hinduism or the great outlying mass of tribal religions from which by insensible degrees converts to Hinduism are continually being recruited.... Persons who are certainly Animists join in Hindu festivals, but persons who are equally certainly Hindus and even Muhammadans join in propitiating the local spirits through aboriginal priests...."