"Is it not a curious fact, Mr. Morgan," he remarked, as he reached the foot of the short ladder he had used to ascend to the roof, "that, although Li Min had not only the motive for the murder, namely, the securing of the emerald Buddha, but also the opportunity, inasmuch as he could readily have reached the porch roof from within the house by means of the hall window, and while the hand print which I have been photographing is small and delicate, like that of a woman, or indeed like that of Li Min himself, yet I have tested every possible human means whereby the windows and doors of that room could have been bolted after the crime was committed, and I can see no possible way in which it could have been done, unless either Major Temple or yourself did it upon entering the room, which you certainly would neither of you have any reason to do were Li Min the guilty person? In spite of many of the peculiarities of Miss Temple's conduct, in spite of Major Temple's altercation with Mr. Ashton, I have been prepared to believe all along that Li Min was on this roof at or near daybreak yesterday morning and I do not mind telling you that I have discovered certain evidence--evidence which had before escaped me, that to my mind proves it conclusively--yet how he could have entered that room, murdered Mr. Ashton, secured the jewel, climbed out of the window and shut and bolted it behind him on the inside is beyond my comprehension. It is not humanly possible--it simply cannot be." He shook his head and looked at me in a state of evident perplexity.
I felt unable to offer any suggestions of value, but I hazarded a question. "Have you searched the attic above the room?" I asked.
"Thoroughly," he replied. "The rafters have never been floored over. The lath and plaster of the ceiling are absolutely unbroken. As for the four walls, two of them are exterior walls, without openings, except the windows. One is the solid partition between the room and the hallway. The fourth is equally solid, and of brick, between the green room and a large closet adjoining it to the east, which has evidently been used as a sort of lumber room, and contains a collection of old furniture, carpets, etc., covered with dust half an inch deep. The dust-covered floor and the rusty lock both show that it has not been entered for a long time. The furniture belongs to the owners of the property, and was evidently placed there years ago when the property was offered for leasing."