Book  (19 Apr 2000)  Page(s) 314.  
 
'LETTY COLES', T, w, 1876; flowers white, center pink; [Mme Mélanie Willermoz sport]; Keynes

Book  (1936)  Page(s) 165.  
 
Coles, Letty (tea) Coles or Keynes 1876; M. Willermoz X ? ; tender pink, large, double, growth 8/10

Book  (1920)  Page(s) 165.  
 
Mr. G. Burch, Peterborough. New Roses - Their Fascination and Marked Periods of Introduction.
…A year later, which must have been 1874, a half-standard tree of Madame Willermoz, a tea-scented variety, colour creamy white, came into the possession of Mr. John Keynes, of Salisbury, and on this tree there was growing a shoot which produced blooms of the deepest red that had yet been seen in a Tea Rose, this Sport was propagated with great care, anxiously watched, and eventually distributed as Letty Coles. It was popular for a time but did not have a long run, as many of the blooms were badly shaped.

Book  (1918)  Page(s) 126.  
 
"The National Rose Test-Garden in 1917" by F. L. Mulford
Letty Coles Low-growing, bushy, not very hardy; foliage sufficient, healthy; bloom sparse, occasional during midsummer.

Magazine  (1 Jul 1911)  Page(s) 314.  
 
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...
Letty Coles... Tea, Coles, 1876, Sport Mme. Willermoz

Book  (1902)  Page(s) 74.  
 
Thé. 1583. Letty Coles (Keynes 1876), rose tendre

Book  (1901)  Page(s) 392.  
 
Tea Roses - Shades of White, or White tinted with Rose, Pink or Salmon, etc.
Letty Coles white, with pink centre, novel and distinct.

Book  (1899)  Page(s) 98.  
 
Letty Coles, thé, Keynes, 1876, rose tendre

Website/Catalog  (1898)  
 
Letty Coles. Soft pink, shaded crimson

Website/Catalog  (1889)  Page(s) 58.  
 
Tea-scented and Hybrid Tea-scented Roses.
Letty Coles ​​​​​​​ Beautiful bright pink; quite a new colour; free and vigorous.