"Carlos," he said, "you might help me. I'm almost afraid to ask. What happened in the cafe last night? The last thing I remember distinctly is sitting there with you and Maria and a stranger she had introduced. I didn't get his name. What did I do? Did any one leave the place with me?"

Paredes smiled a little, shaking his head.

"You behaved as if Mr. Graham's earlier fears had been accomplished. You insisted you were going to catch your train. I didn't think it wise, so I went to the cloak room with you, intending to see you home. Somehow, just the same you gave me the slip."

"You oughtn't to have let him get away," Graham said.

Paredes shrugged his shoulders.

"You weren't there. You don't know how sly Bobby was."

"I suppose it's useless to ask," Graham said. "You saw nothing put in his wine?"

Paredes laughed.

"Is it likely? Certainly not. I should have mentioned it. I should have stopped such a thing. What do you think I am, Mr. Graham?"

"Sorry," Graham said. "You must understand we can't let any lead slip.
This stranger Maria brought up?"