Melville Davisson Post,
Walker of the Secret Service — II. The Holdup
(1924)
“ What human creatures could thus whisper in the sky? Mooney and White returned presently in no very pleasant mood. I think the time taken with the thing made them uneasy. White had the loot sack and we started along across the field, to where we had left the automobile on the road. It was then that I got the explanation of the mysterious voices. There were three hobos riding on the top of the mail car. They had been witnesses of everything that had occurred. They sat there like immense buzzards outlined against the dim light of the sky. Mooney stopped a moment. ”
