We have 166 objects that Mrs. William P. Treadwell has been involved with.

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<ref name=CH>{{cite web |url=https://collection.cooperhewitt.org/people/18049893/ |title=Mrs. William P. Treadwell |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=20 March 2019 |publisher=Smithsonian Institution}}</ref>