Edith Richards was a sister of Dorothy Stover’s, who taught art at Penn State. Phil was a (probably outstanding) student in Dorothy’s class. When Edith wanted to build a home, she also approached Phil about doing the design for her adjacent to her sister’s home. (This is a second instance where Phil designed adjoining homes for sisters, both on Whitehall Road.)
From the plans, she apparently wanted to have a design where the lower level could be used as a separate apartment. From the current photo, the house has now indeed been converted into a duplex. Another major change is the addition of a large deck in front to replace the former smaller balcony.