Book  (1958)  Page(s) 220.  
 
Margraten. F. (M. Leenders, '49.) Donald Prior X World's Fair. Large (3-4 in.), semi-dbl. (16 petals), flat, slightly fragrant, currant-red; truss. Fol. light green. Vig., bushy; free bloom.

Book  (1952)  
 
p141.  Dr. A. S. Thomas.  A Victorian View of the New Roses. 
Chatter: Another large-flowered bright crimson Floribunda. Alain, Chatter, Margraten and Our Princess are all great new roses of this type, and in almost the same shade of red—brighter than Anne Mette Poulsen and not as dark as Nigger Boy.

p143. ibid.
Margraten: A large-flowered, lively crimson Floribunda. The individual blooms are semi-double and open nicely to show attractive yellow stamens. The handsome big trusses make a wonderful display.

Magazine  (Mar 1949)  Page(s) 1. trimester, p. 15.  
 
Vous trouverez, ci-après, une première liste de noms pour lesquels nous avons donné accord à la N.R.S. ...
No Reg.: 48, Name: Margraten, Raised By: M. Leenders & Co., Registered By: M. Leenders & Co., Date: 5.10.48

Translation:
You will find below a first list of names for which we have agreed with the National Rose Society....