air mail

It was the same thing that had happened when he wrote the story of the Air Mail bandit.

They were not in a region frequented by airplanes, nor in the path of an air mail line.

Having been in the air mail service in America, he was dropped when demand slackened and fewer men were needed.

Having taken on his load of air mail, this pilot had stepped into the office to discuss his routing with his chief.

It sent the offer by air mail, leaving delivery up to the post office.