Similar trials were made with three other subjects, Miss B., T., and W. In all 644 trials were made with the agent in the same room with the percipient, of which 131 were successful, that is, both digits were given correctly, though in 14 out of the 131 cases in reverse order. The chance of success was of course 1 in 81, and the most probable number of complete successes was therefore 8. 218 trials were also made with Mr. Smith in a different room from the percipient, but of these only 9 succeeded, one having its digits reversed; 8 of these successes, however, occurred in the course of 139 trials with P., whilst 79 trials with T. yielded only one success. (Proc. S.P.R., vol. vi. pp. 123-170.)

As regards the possibility of unconscious indications of the number thought of being given by the agent, it seems certain that no such clue could have been perceived through the sense of sight or touch, contact between agent and percipient having been absolutely excluded throughout the experiments. It remains to consider whether any indication could have been given by means of sounds. In the presence of two or more attentive and vigilant witnesses any indications by sounds—e.g., an unconscious whispering of the number by Mr. Smith—could only have been perceived by persons of abnormal susceptibility. We know, indeed, of no precise limit which can be set to the hyperæsthesia of hypnotised subjects. But, on the other hand, hyperæsthesia of any sense in such subjects is generally the result of suggestion, direct or indirect, on the part of the operator; and in these experiments the only suggestion given—a suggestion apparently acted on throughout—was that they should see the result. Since, indeed, hypnotised persons are apparently not necessarily aware of the channel by which information reaches them, this circumstance is not in itself conclusive; but taken with the fact that no direct suggestion to hear was given, it tends to make auditory hyperæsthesia less probable. It is perhaps more important to note that the experimenters, including Mr. Smith himself, were fully aware of this source of error, and on their guard against it; that no movements of Mr. Smith's lips, such as must have occurred if he had whispered the number, were observed; and that a careful analysis of the failures shows no tendency to mistake one number for another similar in sound—e.g., four for five, six for seven, or five for nine.

Experiments with Agent and Percipient in different Rooms.

However, the later experiments by the same observers, recorded below, in which a marked degree of success was obtained with agent and percipient in different rooms, will no doubt be considered to render untenable any explanation of the kind above indicated. This further series was carried on through the years 1890-1-2. Mrs. Sidgwick, aided by Miss Johnson, conducted the experiments throughout, with the occasional assistance of Professor Sidgwick, Dr. A. T. Myers, and others. The percipients were P., T., Miss B., and three others, and Mr. G. A. Smith was in nearly all cases the agent. Some of these experiments, as in the last series, were with numbers of two digits; but the percipient was now in a different room from the agent. At first the trials were carried on in an arch, fitted up with two floors, under the Parade at Brighton. On the ground-floor was a little lobby, kitchen, etc.; on the upper floor a sitting-room about 15 feet square. The staircase, which, as shown in the plan subjoined, led directly out of the upper room, was not enclosed above, but had a door below, which was kept shut during the experiments. The floor of the room above was covered with a thick Axminster carpet. Even so the sound-insulation was not perfect; but it was found that words spoken in ordinary conversation on one floor were indistinguishable on the other unless the ear was pressed against the door or wall of the staircase. In the experiments carried on at Mrs. Sidgwick's lodgings in Brighton the percipient sat in the room at a distance from the door, which was closed, varying from 9 to 13 feet, and Mr. Smith was in the passage outside, Miss Johnson sitting between him and the door. Of course strict silence was observed by the agent. One of the experimenters, in most cases Miss Johnson, accompanied the agent, drew the number from the bag, and noted each as it was drawn. Mrs. Sidgwick, of course in ignorance of the number drawn, sat by the percipient and took notes of his remarks. As in the previous series, the impressions received by the percipient, who in the first experiments was Miss B., appear generally to have been of a visual nature. Details of all the trials with Miss B. as percipient and Mr. Smith as sole agent are given in the following table:—

No. 14.—By MRS. SIDGWICK AND OTHERS.

(1) PLACE, THE ARCH. PERCIPIENT UPSTAIRS; AGENTDOWNSTAIRS.
Date 1890.Quite right.Digits Reversed.First Digit
only right.		Second Digit
only right.		Wrong.Totals.Notes.
Jan. 6....6[33]..28{ Professor Barret present in addition to the usual party.
" 711101417
" 8..1[34]2..36This set was done under very unfavourable conditions, as there were three other percipients in the room guessing at the same time, which was very confusing.
" 1111[34]8..1020
" 1291132833
Mar. 173..21612
" 18111148
" 221..51411Drs. Myers, Penrose, and Lancaster present in addition to the usual party.
" 232..6..1018Drs. Myers and Rolleston present in addition to the usual party.
July 8......123
" 9....1326
Nov. 61..11..3Dr. Myers present.
" 101......23
Totals205551157148
(2) PLACE, THE ARCH. PERCIPIENT DOWNSTAIRS; AGENTUPSTAIRS.
Mar. 17....411318
" 23....23712
June 16....1..23Miss McKerlie present.
Totals....742233

(3) PLACE, MRS. SIDGWICK'S LODGINGS. PERCIPIENT IN ROOM, AND AGENT IN PASSAGE.

Date 1890.Quite rightDigits reversed.First Digit
only right		Second digit
only right		WrongTotalsNotes.
Mar. 19...... 1.. 2 3
Dec. 17.. 2.. 1121227These guesses were made by table-tilting, Miss B. normal, having her hands on the table. Miss Robertson present on December 17, 19, and 20.[35]
" 19.. 2 1 3 1.. 7
" 19........ 1 4 5Agent in room across passage, but only one of the two intervening doors closed.
{ 1 1 2.... 4{Guesses made verbally by Miss B. hypnotised, having her hands on the table.
" 20{ .... 1 1 2 4{Guesses tilted by the table, at the same time as the above.[35]
" 20.. 1.. 1 1 4 7Miss B. hypnotised, guessing the usual way.
11[36]4 2 614Guesses made by table-tilting, Miss B. normal, having her hands on the table.[35]
Totals732383071
Totals of (1) (2)&(3)
together		2788523109252