She rapidly bore down upon the fugitives.
It was a long and exciting chase, though, for Siroc and Jim Malone were wonderfully fleet horses.
Several miles were thus covered.
Finally, though, the machine drew close to the two riders.
"Halt!" shouted Jack.
Casting a quick glance back the riders obeyed.
So suddenly did they pull up their steeds, that they rose on their haunches and pawed the air.
The four inmates of the Terror had them covered with their rifles, and when the horses came down and wheeled around, a shout of chagrin escaped Timberlake.
"Duped!"
"What do you mean?" asked Jack, in surprise.