When attempts are made to discover a common origin for the Christian Eucharist, the Aztec communion described by Prescott, and the ceremonial eating and drinking practised by the worshippers of Mithras, it is often assumed that the closer the ritual resemblance between them the stronger the argument in favour of a common origin. It does not seem to have occurred to the maintainers of this hypothesis that public worship, of whatsoever kind it may be, finds expression in a symbolism of its own, just as thought expresses itself in speech and in written language. The fact that Christianity expressed itself in symbol and sacrament does prove that from the very first it claimed to be a religion and not a mere philosophy or school of thought, but it does not prove identity of origin or of intention with the pagan religions which employed the same or similar symbolism. It was inevitable that the Christian Passover should have been singled out in order to illustrate the prepossession that in origin it is essentially pagan. In this case, however, it is not resemblance but coincidence (in point of time) which is supposed to afford the ground of proof. One writer, at least, who rightly connects it with the Jewish Passover, in order to exhibit its sacrificial character,[3] does not hesitate to refer its origin to the worship of Attis or Tammuz, the earth-god, on the ground that the time of its occurrence roughly coincides with the solemnities of Attis. No better illustration of the tyranny of observed coincidence could be found than in his ingenious but futile attempt to apply the principle to Cornwall. His object is to identify the May-day festivities, which he conceives to be a survival of Beltane solemnities, with those of the Christian Passover. Unfortunately for him the latter festival occurs too early; it can never occur later than the twenty-fifth of April. But he has read of Little Easter, which occurs a week later, and attributing to the Cornish a preference for a réchauffé of the Easter banquet to the banquet itself—a preference for which no reasons are vouchsafed—he concludes that Little Easter is the Cornish equivalent of the Beltane Feast. It might have occurred to the maintainer of this opinion to test it by means of the same calculations which forbade the synchronising of Easter itself with the pagan solemnity. Had he done so he would have found that Little Easter (Paskbian) or Low Sunday occurs in May only once in sixty or seventy years, and on May-day less than once in a century.[4] A coincidence which occurs once in a century does not convince the writer and will hardly convince the reader of the identity of the Celtic feast of Beltane with the Christian Passover, or even with the Low Sunday celebration at Lostwithiel described by Richard Carew, the historian.[5]