Book  (1936)  Page(s) 238.  
 
Ena, Princess (polyantha) May 1906; sport of Baby Crimson rambler; deep pink, single, chalice-form, cluster-flowered, short habit.

Book  (1922)  Page(s) 184.  
 
Princess Ena, Polyantha (H.B. May, 1907) Sport of Baby Crimson Rambler.

Magazine  (29 Jul 1911)  Page(s) 362.  
 
The Parentage of Roses.
The following list of the world's Roses and their parentage has been compiled by Mr. Robert Daniel, 38 Russell Road. Fishponds, Bristol, and by his kind permission we are enabled to publish it...
Princess Ena... Perpetual Pompon*, May, 1907, Sport Madame N. Levavasseur

*i.e., dwarf Polyantha

Other  (1910)  
 
Roseraie de L'Haÿ Collection Horticole No. 8219 A [also pencilled 60, XLVIII-25]
Princesse Ena
Obtenteur ..année 1908
Section Synstylae Espèce Rosa multiflora
Race Poly
Coloris Rose
 

Magazine  (25 Apr 1908)  Page(s) 208.  
 
Royal Horticultural Society. The exhibition held on the occasion of the fortnightly meeting, which took place on the 14th inst.....Messrs. H. B. May and Sons, Edmonton, filled a long table with flowering plants, such as Salvia Pride of Zurich. Roses White Pet, Mme. Levavasseur, Princess Ena, a single pink-flowered Polyantha that is very free and charming, the new climbing Rose Liberty and other plants.

Magazine  (May 1907)  Page(s) 74.  
 
[Translation from "The Garden"]
Parmi les petites roses, à signaller Princesse Ena, qui est un genre spécial, ses jolies petites fleursproduisent beaucoup d'effet

Magazine  (22 Dec 1906)  Page(s) 299.  
 
Of the little miniature Roses, Princess Ena is a worthy addition, its pretty little single flowers being highly attractive