Book  (1936)  Page(s) 130.  
 
Carnot (bourbon) Pradel 1851; dark violet, medium size, double, fine form

Book  (1899)  Page(s) 32.  
 
Carnot, Bourbon, Pradel, 1851, violet foncé

Book  (1854)  Page(s) 275-277.  
 
Translation:
Perhaps one or the other lover of ever-blooming roses will thank me if I share the list of those I can recommend from personal acquaintance, regardless of age or novelty. Such are,...4) Ile Bourbon roses: ...Carnot...