Book  (1936)  Page(s) 42.  
 
Aurore (hybrid china) Laffay before 1836, vivid crimson, petals with one white lengthwise stripe, large, double, flat. Sangerhausen

Book  (1936)  Page(s) 338.  
 
Helvetia (hybrid china) = Aurore

Book  (1899)  Page(s) 16.  
 
Aurore, hybride de Bengale, Laffay

Book  (1899)  Page(s) 16.  
 
Aurore Helvetia, Provins, Laffay, cramoisi vif

Book  (1899)  Page(s) 77.  
 
Helvetia, hybride de Bengale, syn. Aurore

Book  (1880)  Page(s) Annex, p. 13.  
 
china, Aurore, Helvetia (Laffay), vivid crimson, occasionally violet, large, double, flat cup form, impressive, good production of seeds.

Website/Catalog  (1861)  Page(s) 63.  
 
Rosa semperflorens (bengalensis indica).
449. Aurora (Helvetius), large, full, carmine, passing to violet.

Book  (1848)  Page(s) Div. II, p. 73-74.  
 
The Hybrid Chinese Rose...Aurora; flowers light lively crimson, sometimes shaded with violet; ray of white often tracing the centre of the petals, large and double; form, cupped. Habit, branching; growth, moderate, forming a closer and more compact bush or tree than the general run of these. A very showy Rose; the tree most beautiful viewed en masse. A good seed-bearer.

Book  (1837)  Page(s) Sect. III, p. 43.  
 
Hybrid Chinas...Helvetius,very beautiful, fragrant. Bluish pink, shaded with lilac, a white stripe in the middle of each petal, 2 inch wide, quite double, semi-globular.

Book  (1837)  Page(s) 877.  
 
Rosa bengalensis. Roses du Bengale.
Hybrides qui ne fleurissent ordinairement qu'une fois par an.
73. Helvétius. fleur rose pourpre, double.