From American Florist, vol. 26, 1906, p. 437:

Mr. Monson has been experimenting in hybridizing roses for many years, and it was after a number of failures that he at last succeeded in getting what he considered at the time was a good flower. It was about 7 years ago that he first hit upon the right combination, probably more by accident than anything else. Among several seedlings which he had produced was one from Mme. Testout + La France, which he crossed with Belle Siebrecht and from which came Kate Moulton. The name it bears was given to it some time ago, but not generally known, it being called the new pink rose locally. It was in honor of the daughter of the man who aided Mr. Monson financially in his first building venture, and himself a great admirer of flowers. Kate Moulton is in a class by itself in size of bloom, as well as a free bloomer, it having averaged last year 49 flowers to the plant, of which the greater per cent were on stems 20 to 36 inches in length, and a great many were even longer than this from a batch carried over one year. Its habit is very robust, and it has never known disease of any kind, not even being affected with mildew when adjoining benches were so affected. It has been grown in both the most favorable as well as the lowest and darkest benches on the place, and did phenominally well under all conditions. It does best, however, with a night temperature of 54° to 56°, when the blooms get their best color. Alongside of Liberty it has done as well, but the colors have inclined to a lighter color. If anything it has done better on its own roots than grafted, and Mr. Monson prefers it on its own roots. It is not a heavy cropper, but more of a continuous blooomer, the finest blooms being cut in December and January. It has the very good habit of breaking freely from the bottom at all seasons and producing stems rivaling American Beauty in strength. In the 4 years since it was born it has sported three different times, the first a cream yellow, which was not considered good enough to keep. The other two are being watched very closely as they give promise of making their mark some day. One is a pure white, and the other is a pleasing copper color, both showing the same robust habit as their parent. The treatment in growing Kate Moulton has been the same as given all the ordinary varieties of roses, except as to temperature, it doing well under most any treatment. [...] The rose must be seen to be fully appreciated, as it would require a master's pen to picture it as well as it deserves.