He saw the outlaw plunge forward and fall prone, his arms outstretched.

He was motionless, inert.
From inside the cabin came the sounds of steps--Antrim's confederates, Lawler supposed.

He heard them approach the door and he leaped, swaying a little, toward the corner of the cabin nearest him.

He had reached it, had just dodged behind it, when Selden and Krell rushed out.

At the same instant Shorty thundered up, slipped out of the saddle and ran toward Lawler, drawing his guns.
Shorty had approached the cabin from the rear, having cut across the space behind the bunkhouses when he heard the shooting.