done."

A half hour later, two innocent looking police boats moved silently up
the river from Madison street bridge. They traveled abreast, keeping
half the river's width between them. From their bows there protruded to
right and left, heavy iron shafts. From these iron shafts, at regular
intervals, there hung slender but strong steel chains. These chains
reaching nearly to the bottom of the river were fitted up at the lower
end with heavy pronged steel hooks. At that same moment, two similarly
equipped boats started up the river from the lake. They were combing the
river with a fine tooth comb.

* * * * *

Meanwhile the men beneath the surface of the river were not idle. They
did not realize the danger which their last act had drawn them into and
therefore did not attempt to escape by running their craft out into the
lake. But they did have other matters to attend to. One of their number
was locked in the rear compartment. His fate was unknown to them. This
much they did know, he had not unfastened the door nor answered when
they called to him.

After vainly pounding and kicking the door, they lifted a heavy steel
shaft and using this as a battering ram, proceeded to smash the door
from its fastenings. At first this did not avail. But at last each
succeeding blow left a slightly larger gap between the door and its
steel jamb. Then suddenly, after a violent ram, which sent echoes
through the compartment, the lower catch gave way. With a hoarse shout
the Russian urged his men to redoubled effort. Three more times they
backed away to come plunging forward. The third blow struck the door at