Book  (Jun 1992)  Page(s) 161.  
 
Duc de Cazes Hybrid Perpetual. Touvais, 1861. Seedling of 'Général Jacqueminot'. The author cites information from different sources... Purplish crimson... Mons le Duc Decazes [sic], who died suddenly in Paris October 24th [1860]. He was over 80 years old... [He was] the founder and keeper of the rich nurseries of the Luxembourg, and was the person who put together the greatest collection of grape-vines in the entire world...

Book  (1936)  Page(s) 135.  
 
de Cazes, Duc (HP) Touvais 1861; Jacqueminot X ? ; velvety dark purple with brown-violet, reverse bronze-brown, large, double, globular, fine form, domed, floriferous, growth 7/10.

Book  (1906)  Page(s) 50.  
 
3.269. Duc de Cazes, Hybride Remontant, Touvais 1861 pourpre violacé brun

Book  (1902)  Page(s) 120.  
 
Hybrides Remontants. Groupe E. — Général Jacqueminot
Les rosiers formant ce groupe, le plus important de tous, sont des arbustes de végétation vigoureuse, très florifères et portant beaucoup à fruit. Rameaux allongés, généralement gris; aiguillons nombreux, crochus; feuillage vert foncé, folioles ovales; floraison le plus souvent en corymbe; fleur forme en coupe ou chiffonnée, frisée, quelquefois globuleuse, coloris du rouge clair au pourpre noirâtre; fruits abondants, de forme plutôt arrondie.
3809. Duc de Cazes... (Touvais 1861)... pourpre violet.

Website/Catalog  (1888)  Page(s) 76.  
 
Hardy Roses.
Remontant or Hybrid Perpetual.  These bloom abundantly in June, and again moderately in Autumn, while a few varieties bloom freely during the Summer.  For general culture they are the most desirable.  
Price, 35 cents each.  Ten or more varieties, our choice, $3.00 per 10.
Duc de Cazes...  Dark velvety purple, large.

Magazine  (1888)  Page(s) 4, no.1.  
 
Eine Auslese der besten Rosen seit dem Jahre 1855 von Jean Soupert, in Firma Soupert & Notting, Luxemburg.
Das Jahr 1860 auf 1861 war nicht so ergiebig an Neuheiten als 1860; in den Handel kamen blos 64 Sorten, worunter 4 Moosrosen, 2 öfterblühende Moosrosen, 2 öfterblühende Monatsoder Portland-Rosen, 9 Thea, 6 Bourbon, 41 öfterblühende Hybrid-Remontant-Rosen. Beachtenswert sind folgende:
11. Duc Decazes (Hybride, Touvais); Blume gross, gefüllt, kugelförmig, Kolorit sammtartig schwarz purpur, Kehrseite des Blumenblattes bronzirt.

Translation: A Selection of the Best Roses since 1855 by Jean Soupert of Soupert & Notting in Luxembourg.
The year from 1860 to 1861 did not produce as many novelties as did the previous season; only 64 varieties were introduced, of which there were 4 mosses, 2 repeat-flowering mosses, 2 remontant Portlands, 9 Teas, 6 Bourbons, and 41 Hybrid Remontant roses. The following are noteworthy:
11. Duc Decazes (Hybrid, Touvais); the flower is large, full and globular; colored a velvety blackish purple with bronzy petal reverses.

Book  (1882)  Page(s) 9.  
 
Duc de Cazes... Hybride Perpétuel. Touvais. 1860 Pourpre foncé. Fleur grande. Plante moyenne.

Book  (1880)  Page(s) 40.  
 
hybrid perpetual, DUC DECAZES (Touvais, 1861), velvety dark purple with violet, reverse bronze-like, large, full, domed.

Website/Catalog  (1875)  Page(s) 4.  
 
38 Duc de Caze, pourpre velouté.

Magazine  (1867)  Page(s) 3.  
 
[In a list of best roses from France 1861-1865] The first [Duc de Cazes], though unsurpassed in its colour and size, opens badly, and too frequently yields a large proportion of imperfect flowers to only one good one. If it were constant...its place in the first rank would be indisputable.