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This photo and Image #2 are on Identical frames. On back in very flowery script it says J H Meyer, 465 Vine St, Cincinnati.
 
Research shows J H Meyer was in business at that location
from 1874-1890.

From a 'period' estimate of the date of clothing, the dates of the photographer, the style of photo frames and the age of the individuals, the #1 & #2 photos might be Barbara and Valentine Volk, taken around the opening date for J H Meyer
of 1874.