An Open SecretIn 1922 Robert Allertondescribed by the Chicago Tribune as the richest bachelor in Chicagomet a twenty two year old University of Illinois architecture student named John Gregg, who was twenty six years his junior. Virtually inseparable from then on, they began publicly referring to one another as father and son within a couple years of meeting. In 1960, after nearly four decades together, and with Robert Allerton nearing ninety, they embarked on a