"Murray," he said sharply, "that pongo is trailing us."
I listened, but could hear nothing. One would hardly expect a white man's ears to detect a gorilla taking special pains to be quiet. Arthur seemed to hear something, however. He quietly raised his rifle. I followed the direction in which he was pointing, but could see nothing. He fired. A branch swayed slightly where his bullet had grazed it, but aside from that there was no sign.
"I didn't see a thing," I remarked.
Arthur shook his head. "It may be nerves," he said quietly. "That damned beast has haunted me, but I think I saw it."
We went on up to the house slowly. Just before we reached the porch Arthur looked at me pitifully.
"I heard it following us all the way," he told me. The perspiration was standing out on his forehead. "It is there, and it is waiting for a chance to revenge itself on me. And the beast has learned cunning! We must look out for Alicia."
I nodded. Evan was waiting for us.
"Find anything?" he called down. "What did you shoot at?"
"The gorilla," said Arthur in a low tone. "It's there and it's determined. We'd better warn Alicia and Mrs. Braymore."
Evan looked dubious. "Did Murray see it?"