CAPTION: "The Point" & "Triangle" The Allegheny the Ohio and the Monongahela Rivers Pittsburgh, Pa. Detail. NOTES: Postcard. Reverse: Genuine Photograph Made by The Process Photo Studios, Troy at 21st St. Chicago, Ill. PHOTOGRAPHER: Johnston & Johnston, Grogan Building, 541 Wood. DATE: 11 July 1931. HEADING: #: From the Collections of the Pennsylvania Department, The Carnegie Library of Pittsburgh.