But it may be well to say something about tests made by Professor William McDougall during a sojourn in California, July-August, 1930. He examined the proofs of previous work and consented to write an introduction to _Mental Radio_, saying: “A refusal would imply on my part a lack either of courage or of due sense of scientific responsibility. * * * It is the duty of men of science to give whatever encouragement and sympathetic support may be possible to all amateurs who find themselves in a position to observe and carefully and honestly to study such phenomena. Mrs. Sinclair would seem to be one of the rare persons who have telepathic power in a marked degree and perhaps other supernormal powers. The experiments in telepathy, as reported in the pages of this book, were so remarkably successful as to rank among the very best hitherto reported. The degree of success and the conditions of experiment were such that we can reject them as conclusive evidence of some mode of communication not at present explicable in accepted scientific terms only by assuming that Mr. and Mrs. Sinclair either are grossly stupid, incompetent and careless persons, or have deliberately entered upon a conspiracy to deceive the public in a most heartless and reprehensible fashion.” As we have seen, the circle of conspirators would have to be enlarged to admit Mr. and Mrs. Irwin, for they vouched for an extraordinarily successful series of experiments at long distance. And it would have to be enlarged to include Professor McDougall himself, since he sent me the materials of his experiments, whose results, though inferior to many of the series of 1928 and 1929, yet show a ratio and quality of correspondence vastly beyond chance expectation. Remember that the 260 Guessing tests resulted in not one drawing which, being compared with the original, could possibly be regarded as a Success, and this by the independent verdicts of two judges. Of course, this does not mean that another set of 260 guesses would not show one Success or more than one, but it does show the great improbability that a particular drawing made by guess will correspond with the particular original enough so that it is possible to call it a Success. The 260 guess-drawings, according to one of the judges, showed 3 Partial Successes, 1 according to the other. Then say there was no Success and but 3 Partial Successes, and it is still unlikely that a particular drawing made in any short guess series will correspond with the particular original to the extent of being worthy of the title Success or Partial Success. On the basis of those 260 guesses we would be warranted in assuming that there would be about one-third of a likelihood of getting either a Success or a Partial Success in a series of 25. But another series of 260 guesses might be more fortunate, so call it an expectation of getting one. Professor McDougall had 25 experiments with Mrs. Sinclair.