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"Watch here, Walter," he directed, "Let me know at the slightest alarm." Craig had already taken the brace and bit from the bag and started to bore through the wall into room 511, selecting a spot behind a picture of a Spanish dancer a spot directly back of her snapping black eyes. He finished quickly and inserted the detectascope so that the lens fitted as an eye in the picture.
Ordinary cameras, because of the flatness of their lenses, have a range of only a few degrees, the widest in use, I believe, taking in only ninety-six, or a little more than a quarter of a circle. So, you see, my detectascope has a range almost twice as wide as that of any other."
It was a detectascope, invented by Gaillard Smith, adapter of the detectaphone, an instrument built up on the principle of the cytoscope which physicians use to explore internally down the throat. Only, in the end of the tube, instead of an ordinary lens, was placed what is known as a "fish-eye" lens, which had a range something like nature has given the eyes of fishes, hence the name.
"I know," I said somewhat nettled, "but what can you see through that putty blower? A key hole is just as good." "Do you realize how little you can really see through a key hole?" he replied confidently. "Try it over there." I did and to tell the truth I could see merely a little part of the hall. Then Kennedy inserted the detectascope. "Look through that," he directed.
It was after her return from this brief interval that she felt her heart give a leap of apprehension, as she looked again through the detectascope. There was Drummond in the back of the store talking to Muller and a woman who looked as if she might be Mrs. Muller, for both, seemed nervous and anxious. As nearly as she could make out, Drummond was alternately threatening and arguing with Muller.
"Go into the back room and get me that brace and bit, Walter," he asked. I did so. When I returned, I saw that he had placed the detectascope and some other stuff in a bag. He shoved in the brace and bit also. "Come on hurry!" he urged. We must have made record time in getting to the Coste. It was an ornate place, where merely to breathe was expensive.
You remember once we used a quick-shutter camera with an electric attachment, which moved the shutter on the contact of a person with an object in the room? Well, this camera has that quick shutter. But, in addition, I have adapted to the detectascope an invention by Professor Robert Wood, of Johns Hopkins.
I wonder if they have told him yet." It was evident that she had lost faith in Kennedy, in everybody, now. "Mrs. Godwin," he urged. "Come you must. It is a last chance." Eagerly he was pouring out the story of the discovery of the afternoon by the little detectascope. "Miriam?" she repeated, dazed. "She know anything it can't be. No don't raise a false hope now."
Ordinary lenses, because of their flatness, have a range of only a few degrees, the widest in use, I believe, taking in only ninety- six degrees, or a little over a quarter of a circle. So you see my detectascope has a range almost twice as wide as that of any other lens."
Kennedy and I had been taking turns at watching through the detectascope while Miss Kendall told us more about how she had come to be associated with the organization to clean up New York.
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