Our eyes scanned the area as we moved in single file through the jungle.

These three animals were moving in single file across the vlei.

They would move in single file, Meecham taking the lead, the lieutenant second, down the line to the last soldier.

Into this the canoes were moving slowly in single file.

They moved in single file to make detection harder.

Below me, moving in single file, four savages moved stealthily.

The density of the rushes forced them to move in single file.

The team moved along in single file behind the Marine.

They moved in single file around the outside of the ring, each horse moving at a carefully controlled walk.

A narrow neck where men could move only slowly in single file.