Book  (Jan 2000)  Page(s) 218.  
 
Sir Edward Elgar Herbaceous Peony. Kelway [no date given]. A single red lactiflora

Website/Catalog  (1935)  Page(s) 12.  
 
Kelway's Single-Flowered Pæonies.
June-flowering. All raised by Kelway unless stated otherwise.
Sir Edward Elgar. Brightest pure maroon or chocolate crimson; a distinct shade; a substantial well-formed very handsome flower; free flowering, medium height; flowers on the surface of the plant; early and mid-season; extra, 7/6

Website/Catalog  (1927)  Page(s) 11.  
 
Kelway's Lovely Single-Flowered Pæonies
Sir Edgar Elgar, maroon or chocolate-crimson, a distinct shade. 7/6 each.

Book  (1907)  Page(s) 77.  
 
782. ELGAR, SIR EDWARD ; P....(Kelway, 1906)
(1) 1906, Kelway's Cat. p. 107.