I had actually seen the new invention!
Scarcely, however, had I recovered from my surprise when I heard, coming from the direction of Grantown, the "pop-pop-pop" of a motor-cycle, and across the bridge like a flash, in the direction the aerial machine had taken, came the spy whom I had only that morning left an invalid in bed.
That evening, while writing a letter in the hotel, I had a surprise; I was called to the telephone, and heard Ray's voice asking me to send the car to him.
He told me that he was staying as Mr. Charles Black at the Star Hotel in Kingussie, about twenty-eight miles distant, and promised to come over to see me shortly.
I told him what I had seen that afternoon, and how the spy had been on the alert, but to my surprise he only replied:
"Good! Keep on the watch. If what I expect is true, then we're on a big thing. Keep in touch with me on the 'phone, and have a continuous eye on your Mr. Goldstein."
I replied that I would, and that our friend had just returned.
Then he rang off.
Why was he at Kingussie, instead of assisting me?
Next day I was early astir, and before luncheon had covered many miles on the motor-cycle. Ray had not asked me over to Kingussie. If he wanted me, he would have said so.