The Golden Age of Handbuilt Bicycles, Jan Heine, Jean-Pierre Pradères, page 60, paragraph 1

In the 1930's, Alex Singer had been a racer. Like many racers, he liked to ride a fixed gear during the winter months, so he built this bike as a fixed gear training bike. Later he modified it into a "porteur", a bicycle to carry parcels to and from the post office. But it also was a machine he could use on the rides of the newspaper carriers - the "porteurs" - many of whom raced on weekends and used their paper delivery routes as training (see p. 92).

Vintage Bicycle Press, 2005, Seattle, 097654600-0