"THE QUAD" opened for business in 1953. Here we see the east store block and northeast corner of the Hinshaw's anchor store.
Photo from http://www.flickr.com/photos/milliemotts/2984458772 (Millie Motts' Photostream)

WHITTIER QUAD as it was configured in 1954. At this time, the shopping hub encompassed approximately 188,700 leasable square feet. As one can see, the open-air mall occupied only a portion of the site at this time. Most of the remainder (in medium gray) was subdivided into residential lots.

A circa-1957 aerial view of the original -thirty-store- shopopolis. The major tenants were Hinshaws (lower left), a Shopping Bag supermarket (upper left) and W.T. Grant (at the center of the shot).
Photo from http://beta.worldcat.org / Howard D. Kelly / Los Angeles Public Library