Book  (1936)  Page(s) 140.  
 
Chalet, Ardoisée du (HP) E. Verdier 1864; slaty purple, shaded fiery carmine

Book  (1936)  Page(s) 148.  
 
Chatelet, Ardoisée de (HP) E. Verdier 1865; slaty purple, shaded crimson, large, double, fine form.

Magazine  (Jun 1902)  Page(s) 83.  
 
NÉCROLOGIE - EUGÈNE VERDIER
Rosiers Mis au Commerce par Eugène Verdier.
Ardoisée du Chalet: Hybride Remontant, 1865.

Book  (1899)  Page(s) 13.  
 
Ardoisée du Chatelet, HR, E. Verdier, 1865, pourpre nuancé

Book  (1880)  Page(s) Annex, p. 11.  
 
hybrid perpetual, Ardoise de Chalet (Eug. Verdier, 1865), slaty purple, shaded with fiery carmine

Magazine  (29 Nov 1864)  Page(s) 426.  
 
M. Eugène Verdier announces the following, of whose parentage nothing is said; and the only information is that he has a part of the stock. I hardly think that one would be justified in looking for much from them. These are -
Ardoisé du Châlet.- Slaty purple shaded with carmine.