Book  (1837)  Page(s) 876.  
 
Rosa bengalensis. Roses du Bengale.
Hybrides qui ne fleurissent ordinairement qu'une fois par an.
71. George IV. fleur cramoisi, et pourpre obscur.

Website/Catalog  (1837)  Page(s) 12.  
 
Hybride Georges IV....1 fr. 25 c.

Magazine  (Nov 1835)  
 
The Floricultural Cabinet (Nov 1835)
Thomas Rivers, jun.
I have seen those two dark varieties, George the Fourth and the Tuscany, lose their colour and become blush, and changes as extreme take place in others: what I hope to accomplish is, to give an idea of what they ought to be in form and colour, under favourable circumstances of soil and situations; and where there is so much confusion as at present in the names and arrangement of Roses, to be among the first in attempting a correct nomenclature.

Magazine  (1835)  Page(s) 296.  
 
There is a class of roses, denominated hybrids, having been raised principally betwen the China rose (R.indica) and the R. gállica. They are exceedingly beautiful, and include among them some of the most splendid Roses known; one of these is Rivers' George IV. ...An Amateur. Cambridge, July 10th, 1835.

Website/Catalog  (1833)  Page(s) 59.  
 
Hybrid China Roses
892 Georg IV. Large, double, dark purple....1 Reichsthaler

Book  (1832)  Page(s) 2.  
 
Hybrides, Bengales et Noisettes....George IV ....4 F

Website/Catalog  (1831)  Page(s) 45.  
 
Hybrides de Bengale
608 George IV ...5 à 6 francs , Diamètre 3, Pourpre foncé

Website/Catalog  (1830)  Page(s) 60.  
 
Liste des Rosiers non classés existant chez moi...Rosiers du Bengale...Hybrides...
128. Georges IV.