Mr.Wynne was idling along, half a block away, without the slightest apparent interest in what was happening behind.

Inevitably Mr.Birnes' eyes were drawn to the water-plug across the street.

A tag end of white paper gleamed tantalizingly.
Now what the deuce did it mean?
Being only human, Mr.Birnes went across the street and got the paper.

It was an envelope.

As he unfolded it and gazed at the address, written in pencil, his mouth opened in undignified astonishment.