We have 2 objects that Simpson, Hall, Miller, & Co. has been involved with.

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<ref name=CH>{{cite web |url=https://collection.cooperhewitt.org/people/18045413/ |title=Simpson, Hall, Miller, & Co. |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=30 July 2021 |publisher=Smithsonian Institution}}</ref>