"No use getting in a stew about it," advised Billy, concealing the fact that he himself was nearing the boiling point as the last few hours of waiting wore away.
The morning of the fourth day, and no sign or sight of the absentees.
Billy and Henri sat in council, and the former opened the paper that had haunted his dreams during the previous restless night.
"If alive, we are in Warsaw."
"I guessed that once." Billy lifted his eyes from the paper.
"Go on," impatiently urged Henri.
"Of either fact you may learn by following instructions. You are to bring both biplanes, early morning, and circle over the city. In the south section you will note tall column with figure on top in center of square. Back of same is elevation on which rise two towers. Watch these. If one flag shows, hold over high road running west; if two flags, sail north and land at lodge house where canary sang for us. There wait. If highroad route (one flag), see red scarf signal for drop. When you read and commit these lines destroy."
"What a system that old fox controls," observed the reader. "Killing one of his men didn't close the show in Warsaw. Do you get all this, pard?"
"I think I do," asserted Henri, "but let me go over it again to be sure."