Book  (Dec 2000)  Page(s) 88.  
 
Duke of Fife
Hybrid Perpetual
[James] Cocker & Sons 1892

Book  (1985)  Page(s) 151.  
 
The early Cockers were not notable rose breeders. Their first varieties, brought out in 1892, were two chance sports from Hybrid Perpetuals. One was a deeper coloured flower found among their stock of the carmine 'Etienne Levet', and introduced as 'Duke of Fife'; a pale variation among the pink 'Countess of Roseberry' became 'Duchess of Fife"...

Book  (1936)  Page(s) 260.  
 
of Fife, Duke (HP) Cocker 1892; sport of Et. Levet; glossy crimson-scarlet, large, double, fine form, folded petals, growth 6/10.

Magazine  (3 Jun 1911)  Page(s) 266.  
 
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...
Duke of Fife... Hybrid Perpetual, Cocker, 1893, Sport Etienne Levet

Book  (1910)  Page(s) 283.  
 
Duke of Fife Hybrid Perpetual; a crimson-scarlet sport of Etienne Levet.

Booklet  (1904)  Page(s) 21.  
 
Duke of Fife  (Cocker & Sons 1892). A rich crimson-scarlet Etienne Levet, being identical in every way except color. Mod.
Exh. Gdn. 

Booklet  (1899)  Page(s) 19.  
 
Hybrid Perpetuals.
Duke of Fife Cochet 1892. S. G.  Deep crimson-scarlet, vigorous 

Book  (1899)  Page(s) 56.  
 
Duke of Fife, HR, Cocker, 1892, cramoisi éclatante

Website/Catalog  (1897)  Page(s) 49.  
 
Hybrid Perpetuals.
Duke of Fife  a crimson scarlet sport from Etienne Levet. 

Magazine  (1 Nov 1893)  Page(s) 167.  
 
Roses Récompensées et Mises au Commerce en 1892
Accidents Fixés. Hybrides remontants.
67. Duck of Fife [sic] (James Cocker et Son): quatre diplômes de première classe, accident fixé de la très belle variété (Etienne Levet, Levet père, 1871). Fleurs d'un riche cramoisi écarlate.