But the opinion that spirits fly away at cock-crow is of extreme antiquity. It is mentioned by the Christian poet Prudentius (fourth century) as a tradition of common belief.[57] As for the effect of the name of God as an exorcism, we still encounter this superstition, a living thing in our own day, and in every land where modern 'spiritualism' finds believers. The mischief produced at 'spiritual seances' by 'bad spirits' is well-known to those who have paid any attention to this subject. The late Mr. FitzHugh Ludlow once related to me, with dramatic fervour, the result of his attempts to exorcise a bad spirit which was in possession of a female 'medium,' by trying to make her pronounce the name of Christ. She stumbled and stammered over this test in a most embarrassing way, and finally emerged from her trance with the holy name unspoken; the bad spirit had fled. This was in New York, in 1867. Like many others who assert their unbelief in spiritualism, Mr. Ludlow was intensely impressed by this phenomenon.