Book  (2021)  Page(s) 86-87.  
 
'Duc de Cambridge'...Laffay, 1840 ....Description.... Accoreding to the DNA study, the nearest relatives of 'Duc de Cambridge' are the Bourbon roses 'Eléonore de Berty', 'Great Western', 'Farmor Selma' and 'Skeda'. Their similarity indices with 'Duc de Cambridge' are 63,6, 62,5, 56,5 and 54,5%. The next three closest sorts are the Bourbon roses 'Strömsro', 'Maria von Wright' and 'Pipar Hans' with similarity indices between 53,8 and 50,0%....

Newsletter  (May 2015)  Page(s) 24.  Includes photo(s).
 
[From "Suckering Roses Revisited", by Darrell g.h. Schramm, pp. 23-27]
In the Damask family, the determined ‘Duc de Cambridge’ (c. 1848) will send his suckers into the shade or undergrowth, should it be nearby—a vigorous fellow.

Book  (Apr 1999)  Page(s) 75.  
 
Duc de Cambridge Damask. Laffay, pre-1841. The author cites information from different sources... Light ruby... purple... deep grenadine, exterior petals edged with crimson... The Duke of Cambridge referred to would be the seventh son of George III of England, Adolphus Frederick (1774-1850), quondam viceroy of Hanover.

Book  (Dec 1998)  Page(s) 208.  Includes photo(s).
 
Duc de Cambridge ('Duchesse de Cambridge') Damask. Pre-1848. Description... deep, purple-rose petals forming double, full, large blossoms. It is probably the darkest of all Damask flowers...

Newsletter  (Apr 1995)  Page(s) 23.  
 
"Twenty of the Best Hardy Roses for Nurserymen Selling Roses in New Hampshire" by Mike Lowe
Almost all the once-flowering old garden roses are hardy in most areas of the state. The exception is north of the notches where winter protection is a must for all but the Spinosissimas and a very few others.
Here are the ten best once-flowering roses—in no particular order.
Duc de Cambridge. Damask. 1848. Flowers—bright dark pink centers, outer petals medium pink, full, very double, and large. Bush vigorous to five feet. Suckers on own roots.

Book  (Apr 1993)  Page(s) 145.  
 
Duc de Cambridge Damask, deep purplish rose, 1800. Description.

Book  (1936)  Page(s) 122.  
 
de Cambridge, Duc (damask) ? ? ; dark garnet, edges crimson-purple, large, double.

Book  (1899)  Page(s) 53.  
 
Duc de Cambridge, damas, grenat foncé

Book  (1863)  Page(s) 203.  
 
Rosa damascena.
The Damask Rose.
5. Duke of Cambridge; flowers deep purplish rose, large and full.

Book  (1860)  Page(s) 116.  
 
Damask...Duke of Cambridge, very large, full, deep cherry-red, perfect form; vigorous, the younf foliage is reddish on the edges.