Walter Mack, executive director of the Penn Center, is shown here Monday afternoon next to the original bell that sat atop Penn School in 1862.
Walter Mack, executive director of the Penn Center, is shown here Monday afternoon next to the original bell that sat atop Penn School in 1862. Sarah Welliver
Walter Mack, executive director of the Penn Center, is shown here Monday afternoon next to the original bell that sat atop Penn School in 1862. Sarah Welliver

Penn Center director retiring after 26 years

July 09, 2012 08:48 PM

UPDATED October 05, 2012 07:38 PM

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