Book  (1936)  Page(s) 356.  
 
Humbser, Louise (tea) Ketten 1904; Sylphide X Prés. Constant; orange-salmon, vermilion reflexes, edges pink-white, large, double, solitary, fragrance 7/10, floriferous, growth 6/10.

Magazine  (8 Jul 1911)  Page(s) 326.  
 
The Parentage of Roses.
The following list of the world's Roses and their parentage has been compiled by Mr. Robert Daniel, 38 Russell Road. Fishponds, Bristol, and by his kind permission we are enabled to publish it...
Louise Humbser... Tea, Ketten, 1904, La Sylphide X President Constant

Book  (1910)  Page(s) 196.  
 
Frau Louise Humbser (Tea-scented), salmon-orange, tinted vermilion. [Paul lists it under New Roses of 1902-1903]