What would a pair of Edward Algernon S. Douglas signed prints from 1877 be worth?

Answer 1

The prints are approximately 21" h x 16.5" w and in identical matted frames. Douglas' name is printed on the lower left and the engraver's name, (E. G. Hester) on the lower right. The prints are signed on the lower right by Douglas and dated 1877 and 1879.