San Francisco Chronicle

Rod Smith, The Wine Page, "A Fine Crew of California Zinfandels Ages Well", april 1989,

It could only be described as a fine Zinfandel in its prime. That was the case with the 1979 Quantum Leap, made by Sonoma County grapegrower William Hawley from his own vineyard in the Mount Veeder area. As a dry late harvest wine, it showed another classic zin style that is unique to the variety. Inky purple and very, very ripe, it showed volcanic Zinfandel flavors and a dusting of black pepper in the long finish.