Book  (5 Apr 2010)  
 
'Mary Warren'. HT, mp, 1931, Clark, A.; flowers pink, open, large, semi-dbl., slight fragrance; recurrent bloom; foliage soft, large, dark; vigorous, pillar growth. Mrs Frank Guthrie × Scorcher] Introductions: NRS New South Wales.

Magazine  (Feb 2010)  Page(s) Vol 22, No. 1.  
 
John Nieuwesteeg: The gardener directed us to another Kelly property just out of Carramut called "Eulo"...... Growing on the wall of the shed was an interesting climber with very bright pink single flowers fitting the description of AC's 'Mary Warren', a cross between 'Scorcher' and 'Mrs. Frank Guthrie'.

Book  (2010)  Page(s) 132.  
 
Mary Williams Warren was born in ……

Book  (2007)  Page(s) 47.  
 
Australian bred R. gigantea Hybrids. A review as at October 2006 by Laurie Newman (Australian registrar). The findings below are based on research of some of the writings of Alister Clark between 1924 and 1942. There are anomalies contained in the papers, but on balance I believe the list to be conclusive.
Firstly, there are the three listed in American Rose (Sept, 2006, page 9, namely,
Courier (MR11 LCl.)
Kitty Kininmonth (MR11 LCl.) and
Tonner’s Fancy (MR11 LCl.)
Add ……..etc. and
‘Scorcher’ (MR11 Cl. HT) (Pollen parent should be R. gigantea)
Add ‘Scorcher’ Seedlings:
Mary Warren
……My thanks are expressed to American Rose Society for inviting me to submit to the revised Gigantea Hybrid classification.

Book  (30 Sep 1999)  Page(s) 13.  
 
Mary Warren. 1931. Large flowered climbing rose, large, semi-double, pink flowers. No longer available.

Newsletter  (1995)  Page(s) 17. Vol 4, No. 1.  
 
Mary Warren. HT. Clg. 1931 Alister Clark. Mrs. Frank Guthrie x Scorcher.

Book  (Apr 1993)  Page(s) 365.  
 
Mary Warren Climbing Hybrid Tea, Flower spink [mp], 1931, 'Mrs. Frank Guthrie' x 'Scorcher'; Clark, A.; NRS New South Wales.

Book  (1990)  Page(s) 121.  
 
Mary Warren. Dazzling pink. Climber.

Magazine  (1979)  Page(s) 6. Vol 1, No. 3.  
 
Alister Clark Roses. Mary Warren. 1931. intro. NRS N.S.W. Climbing HT, large semi-double open, slightly fragrant, pink. Foliage large soft and dark. Vigorous Pillar, recurrent bloom. Mrs. Frank Guthrie x Scorcher.

Website/Catalog  (1941)  Page(s) 13.  
 
Mary Warren. (Cl. HT) Alister Clark) A fine pillar Rose carrying large flowers of a new shade of dazzling pink.