Thanks to Jonathan Daniel of Pittsburgh PA for the following images.
Jonathan Daniel came across the following pictures of River Ridge Farm in a microfilm version of a Pittsburgh magazine called "The Builder" at the Oakland branch of the Carnegie Library.
The issue dates from October 1915, and features various exterior shots of River Ridge Farm. The pictures came from a photo feature of Louis Stevens's work.
The back side of the River Ridge Mansion showing the mansion's main entrance with the farm secretary and the Grandelis family dog Stubby. Abt. 1914.
The mansion was completed November 1913.
A close-up of the main entrance to the mansion, abt. 1914.
Additions Added to the Mansion between 1913 and 1915
If you compare the left image of the mansion's right wing, believed to have been taken shortly after the mansion was completed in 1913 to a comparable image taken abt. 1915,
you will notice that in the right image there has been a two story addition added to the left side of the mansion.
The addition consists of a sunroom on the lower floor and addional bedrooms on the upper floor. You can also see a shade difference in the newer section's roof line.
A similar two story addition was added to the mansion's left wing on the opposite side of the building.
The additions were noted by Jonathan Daniel of Pittsburgh PA when he sent in these new "early" photographs of the mansion.
The top image is of the front side of River Ridge Mansion.
The bottom image is another look of the mansion's main entrance with the farm secretary and the Grandelis family dog Stubby. Abt. Oct 1914.