"One Sunday afternoon Emil and I were walking in a field when he called my attention to a pigeon circling overhead and casually remarked that the bird was looking for him. He stood perfectly still and in a few moments the bird alighted upon his outstretched arm. He said the bird has a message from his brother in the North. This proved to be a fellowworker who had not reached the attainment whereby he could communicate directly, so he took this means. We later found that the Masters are able to communicate with each other instantly by thought transference or, as they call it, a force much more subtle than either electricity or wireless. (Chapter I)"
January 1, 1970
https://en.wikiquote.org/wiki/Baird_T._Spalding