The sergeant hastened to obey.
"Bueno!" said Donald, as the passengers rushed back.
Then under his breath to Billie: "Call Adrian."
Billie did so.
"Where are you?" Adrian called back.
"Down near the engine."
A moment later Adrian appeared coming through the crowd of hurrying passengers.
"Where's Don?" he asked as soon as he caught sight of Billie.
"Not far. Stay here. We may need you."
Adrian's face showed some surprise, but he said nothing.