J. Janssen submitted an article for SQUILLS in 1902, and admitted to trying the widowhood system.
"In Liege a great number of fanciers do not mate the birds at all intended for long-distance races; others let them rear a single young one, and then remove the hen from the loft, so that during the whole of the flying season the cocks are alone. I have tried this system, but must confess I did not find it successful."
TCC Loft - Racing Pigeons - Mike Taylor