It was a good half-hour before Mr. Gryce again found himself in a position to pursue the line of investigation thus summarily interrupted. The condition of Mrs. Taylor, which had not been improved by delay, demanded attention, and it was with a sense of great relief that Mr. Gryce finally saw her put into a taxi. Her hurried examination by Coroner Price had elicited nothing new, and of all who had noticed her distraught air on leaving the building, there was not one, if we except the detective, but felt convinced that if she had not been of unsound mind previous to this accident, she certainly had become so since. He still held to his theory that her story, fantastic and out of character as it seemed, was true in all its essentials, and that it was the warning she believed herself to have received of her husband’s death, rather than what had taken place under her eyes, which had caused her such extreme suffering and temporarily laid her reason low.

With the full approbation of the Coroner, to whom he had explained his idea, Mr. Gryce began the sifting process by which he hoped to discover the one witness he wanted.

To subject to further durance such persons as from their position at the moment of tragedy could have no information to give bearing in any way upon their investigation was manifestly unfair. The old woman who had been found in Room A was of this class, and accordingly was allowed to go, together with such others as had been within twenty feet or more of the main entrance. These eliminated (it was curious to see how loath these few chosen ones were to depart, now that the opportunity was given them), Mr. Gryce settled down to business by asking Mrs. Lynch to come forward.

She, as you will see by consulting the chart, answered to the person marked “2.” A little, dried-up, eager woman rose from the bench on which were collected the few people still remaining, and met his inquiring look with a nervous smile. She, of all the persons moving about on the main floor at the moment of alarm, had been in the best position for seeing the flight of the arrow and the fall of the victim in Section II. Had she seen them? The continued jigging of the small, wiry curls hanging out from either side of her old-fashioned bonnet would seem to betray an inner perturbation indicative of some hitherto suppressed information. At all events Mr. Gryce allowed himself this hope and was most bland and encouraging in his manner as he showed her the place which had been assigned her on the chart drawn up by Sweetwater, and asked if the position given her was correct.

Perhaps a ready reply was too much to expect — women of her stamp not knowing, as a rule, very much about charts. But when he saw her hasten to the very spot assigned her by Sweetwater, he took heart and with a suggestive glance at the gallery intimated that he would be very glad to hear what she had seen there. Her surprise was evident, much too evident for his satisfaction. The little curls jigged about more than ever, and her cheeks grew quite pink as she answered hastily:

“I didn’t see anything. I wasn’t looking. Did you think I saw anything?”

“I hoped you had,” he smiled. “If your eyes had chanced to be turned toward that end of the gallery ——”

“But I was going the other way. My back was to it, not my face — like this.” And wheeling herself about, she showed him that she had been walking toward the rear of the building rather than advancing toward the front.

His disappointment was great; but it would have been greater if he had not realized that under these conditions she was in the precise position to meet face to face any person emerging into the court from the foot of the small staircase. If she could tell him of having seen any such person, and closely enough to be able to give a description of this person’s appearance, then she might prove to be his prime witness, after all. But she could not satisfy him on this point. She had been on her way out, and was too busy searching in her bag for her umbrella check to notice whether there were people about her or not. She had not found it when the great shout came.

“And then?”

Oh, then she was so frightened and so shocked that everything swam before her eyes and she nearly fell! Her heart was not a strong one and sometimes missed a beat or two, and she thought it must have done so then, for when her head steadied again, she found herself clinging to the balustrade of the great staircase.

“Then you have nothing whatever to add to what the others have told?”

Her “no,” if a shaky one, was decisive, and seeing no reason for detaining her further, he gave her permission to depart.

Disturbed in his calculations, but not disheartened, Mr. Gryce next proceeded to interrogate the door-man at this end of the building. From his position, facing as he did the approach from the small staircase, he should be able to say, if the old lady could not, whether anyone had crossed the open strip of court toward which she had been advancing. But Mr. Gryce found him no more clear-headed on this point than she. He was the oldest man connected with the museum, and had been very much shaken up by what had occurred. Really, he could not say whether anyone had passed across his line of vision at that time or not. All he could be sure of was that no attempt had been made by anyone to reach the door after he had been bidden to close it.

So this clue ended like the rest in no thoroughfare. Would he have any better luck with the subject of his next inquiry? The young lady tabulated as No. 13 was where she could have seen the upper edge of the tapestry shake if she had been looking that way; but she was not. She also was going from instead of toward the point of interest — in other words, entering and not leaving the room on whose threshold she stood.

Only two men were left from whom he could hope to obtain the important testimony he was so anxiously seeking: Nos. 10 and 11. He had turned back toward the bench where they should be awaiting his attention and was debating whether he would gain more by attacking them singly or together, when he suddenly became aware of a fact which drove all these small considerations out of his mind.

According to every calculation and according to the chart, there should be only these two men on that bench. But he saw three. Who was this third man, and where had he come from?