The Delta Omicron Foundation trustees conducted their annual meeting of August 10, 2007 in Peterborough, New Hampshire. While there, they attended some of the centennial activities of the MacDowell Colony and visited the Delta Omicron Studio at the colony. 

The trustees presented a framed graphic depicting the keyboard of the Petzold-Collyer Memorial Piano in the Delta Omicron Studio with the names of donors who had purchased keys. It also included photographs of the first two presidents of the foundation, Roxine Beard Petzold and Adelaide Louise Collyer, for whom the piano is named.

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