Covenant followed her, his guards behind him in single file.

Penn marched straight through the house, and the two thugs followed in single file.

Ragged black soldiers, all wary eyes and ready weapons, follow in single file.

The horses followed each other in single file, Myers in the lead.

His band of thirty followed in single file, leaving a gap from nose to tail.

The horses had to follow each other in single file down the narrow track.

The four companies followed in single file 160 yards behind the advance guard.

Jane and Gene followed in single file over the rocky ground.

The other horsemen followed in single file behind him.

Nodding their understanding, they all followed after him, in single file, out onto the rocks.