Website/Catalog  (1909)  Page(s) 4.  
 
Duke of Clarence. Cream, slightly flushed pink...$ 1 25

Book  (1907)  Page(s) 55.  
 
525. CLARENCE, DUKE OF ; P.
(1) 1890, The Gardening World, Vol. 6, p. 667.
(2) 1891 Kelway's Cat. Fewkes' MSS.
(3) Cornell Plot No. 325.

Website/Catalog  (1903)  Page(s) 3.  
 
KELWAY’S LATEST INTRODUCTIONS OF DOUBLE HERBACEOUS PAEONIES
Duke of Clarence, cream, slightly flushed pink. First class ctf. R. B. S...$1.75.

Website/Catalog  (1892)  Page(s) 25.  
 
Double Herbaceous Pæonies of 1891 (Kelway's).
Duke of Clarence, cream, slightly flushed pink; First-Class Certificate, R.B.S., June 11th, 1890.

Magazine  (21 Jun 1890)  Page(s) 667.  
 
Varieties of Pæonia albiflora.
Duke of Clarence.—The flowers of this variety are of great size, and fully double, forming a globular mass of pink, with broad white margins to the petals, nearly resembling the colour of the Rose La France.
[...] The three last named were shown by Messrs. Kelway & Son, Langport, at the June exhibition of the Royal Botanic Society on the 11th, and were awarded Floricultural Certificates.