"They were dropped," Del said, "and slid. Some of them are still in order - see - Goldberg, Goldberg, Goldberg, Goldberg - then Domovitz. Whoever picked them up just shuffled them roughly together." He put the Goldbergs onto the G pile and Domovitz on the Ds.
"It won't take long," he said. "I had to do this a few month ago at the museum when someone - not me - dropped a drawer of filing cards."