'Killarney' was introduced in 1898, which make it an unlikely sport-parent of 'Childs' Jewel'. I've added another picture from the 1894 catalog.

Childs' 1896 catalogue

Childs' Jewel
The Rose of Many Colors. Flowers of Various Colors Borne on the Same Plant at the Same Time.
During the past few years we have introduced several new Roses, some of which are among the most valuable known at the present time, such as "Champion of the World," "Mary Washington," etc. We now offer the most remarkable Rose in cultivation, as well as the most novel and beautiful one. Childs' Jewel produces flowers which range in color from dark orange-yellow to crimson, variegated, blotched, mottled etc. A plant in bloom shows no two flowers alike. Some will be dark yellow; others, light yellow, buff, saffron, light and dark crimson, pink, blush, apricot, etc.; while others will be variegated in a most beautiful manner. As may well be imagined, the sight which such a plant in bloom presents is a novel and beautiful one. It is a pure Tea Rose, the flower being large, delightfully fragrant, and in both bud and blossom exquisitely beautiful. It is a free grower, and a profuse bloomer, especially in the open ground. As a rose novelty this is the most remarkable ever introduced, and as may well be imagined creates a sensation wherever seen, and sells readily at two and three dollars each when in bloom.