They just moved concertedly to get farther away from the center of the street, not taking their interested gaze off us for one second in the process.
"The Holes Around Mars"
Jerome Bixby
Once the outlaws made an attempt to withdraw, rushing concertedly toward their horses, which they had concealed in a sand draw slightly behind them, southward.
"The Trail Horde"
Charles Alden Seltzer
Ruth saw the men in the group at the rear reach, concertedly, for their weapons; she saw smoke streaks stabbing the heavy atmosphere of the big room; heard the roar and crash of pistols; saw men falling, to land in grotesque positions; saw Shorty, huge and terrible amid the billowing smoke, shoot a man who tried to leap over the bar, so that he fell across it limply, as though sleeping.
"The Trail Horde"
Charles Alden Seltzer