"Positive!"
It was impossible for Aldous to repress his excitement. The engineer stared at him even harder than before.
"What can that grave have to do with Quade?" he asked. "The man died before Quade was known in these regions."
"I can't tell you now, Peter," replied Aldous, pulling the engineer to the table. "But I think you'll know quite soon. For the present, I want you to sketch out a map that will take me to the grave. Will you?"
On the table were pencil and paper. Keller seated himself and drew them toward him.
"I'm damned if I can see what that grave can have to do with Quade," he said; "but I'll tell you how to find it!"
For several minutes they bent low over the table, Peter Keller describing the trail to the Saw Tooth Mountain as he sketched it, step by step, on a sheet of office paper. When it was done, Aldous folded it carefully and placed it in his wallet.
"I can't go wrong, and—thank you, Keller!"
After Aldous had gone, Peter Keller sat for some time in deep thought.
"Now I wonder what the devil there can be about a grave to make him so happy," he grumbled, listening to the whistle that was growing fainter down the trail.