Magazine  (1891)  Page(s) 98.  
 
I have left some bush roses uncovered for winter due to lack of time, some others intentionally uncovered as I believed them hardy. Then I found out the following:
A. Frozen do teach are despite the best, strongest, healthiest wood especially Robusta (Bourbon). Furthermore Ornement des bosquets and several Belle de Baltimore; Venusta pendula (alias Ruga) suffered severely. ...O. Schultze

Book  (1889)  Page(s) 153.  
 
Bourbon-Roses...Robusta (Soupert & Notting 1877). Medium size, double, cluster-flowered, velvety fire-red, passing to purple. Very vigorous.

Book  (1882)  Page(s) 33.  
 
Robusta...  Ile-Bourbon.  Soupert et Notting.  1877  Rouge ardent.  Fleur moyenne.  Plante robuste.

Book  (1880)  Page(s) Annex, p. 117.  
 
bourbon, Robusta (Soupert & Notting, 1878), velvety fire-red, passing to purple-red, medium size, double, blooms in clusters.