vintagehomeplans:United States, 1903: Design No. 56A large duplex with both sitting room and parlor
vintagehomeplans:United States, 1903: Design No. 56A large duplex with both sitting room and parlor in each unit. The front and rear stairs both meet at a landing before continuing to the upper level.The Radford Ideal Homes by The Radford Architectural Company, 1903. (Chicago, IL, USA) —from my library -- source link