One pauses to consider the words “he found them a strain.” May it be that when experiments reveal thought-transference the agent generally does feel a strain beyond that involved in merely gazing at an object and wishing (or willing, or what you please) that the percipient may get the idea of it. If so, it would seem to imply, not necessarily some energy proceeding outwardly, but at any rate some process going on within which causes the special exhaustion. But no statistics bearing on this question have been gathered from successful agents. It is one of the many sorts of data which must be accumulated in the future. Mr. Irwin and his wife made corroborating affidavits, as follows: To whom it may concern: Robert L. Irwin, having been duly sworn, declares that he has read the portion of manuscript by Upton Sinclair dealing with his experiments in telepathy with Mary Craig Sinclair, and that the statements made therein having to do with himself are true according to his clear recollection. The drawings attributed to him were produced by him in the manner described, and are recognized by him in their photographic reproductions. The experiments were conducted in good faith, and the results may be accepted as valid. [Signed] ROBERT L. IRWIN. To whom it may concern: Dollie Kimbrough Irwin, having been duly sworn, declares that she has read the portion of manuscript by Upton Sinclair dealing with experiments in telepathy by her sister, Mary Craig Sinclair, and having to do with her husband, Robert L. Irwin; that she was present when the drawings were made and the tests conducted, and also when the completed drawings were produced and compared. The statements made in the manuscript are true according to her clear recollection, and the experiments were made in good faith and with manifest seriousness. [Signed] DOLLIE KIMBROUGH IRWIN. These statements were severally. “Subscribed and sworn to before me this 26th day of July, 1929, [Signed] LAURA UNANGST, Notary Public in and for the County of Denver, Colorado.” The Sinclair-Sinclair Group of July 14–29, 1928 We are in two passages told precisely the conditions of this group of experiments. Since her brother-in-law felt obliged to withdraw from participation, Mrs. Sinclair asked her husband to make some drawings. * * *