Book  (1907)  Page(s) 62.  
 
616. CYNTHIA; P.
(1) 1896, The Gardening World, Vol. 12, p. 622.
(2) 1905, Terry's Cat.
(3) 1906, May & Go's Cat. p. 90.
(4) 1906, Thos. Meehan's Cat. p. 47.

Probably more than one peony of this name...

Book  (1907)  Page(s) 25.  
 
I might have mentioned some of Terry's, which are of especial merit on account of robustness, hardiness and beauty. His Etta, Victor, Morning Star, Prince of Wales, Bell Hough, Sada Evans and Cynthia stand well at the head. ...C.S. Harrison

Book  (1907)  Page(s) 37.  
 
Cynthia. Terry, 1898. Charming, light rose, fading to white, reminding one of Agnes Mary Kelway, which it surpasses in beauty and vigor, as grown in Nebraska. A flower with a future.

Website/Catalog  (1905)  Page(s) [2].  
 
*Cynthia. Beautiful light rose becoming white, a fine variety. 50¢

*[Varieties] marked with a star will not be for sale until autumn of 1905.

Website/Catalog  (1904)  Page(s) [1].  
 
*Cynthia. Fine dark crimson, bright yellow stamens, cupped. 50¢

*Those marked with a star will not be for sale until autumn of 1904.