Book  (Apr 1993)  Page(s) 408.  
 
New Columbia Hybrid Tea, true pink, deepening to glowing pink, 1924, 'Columbia' sport; Hill, E.G., Co.

Book  (1936)  Page(s) 166.  
 
Columbia, New (HT) E.G. Hill 1924; Sport of Columbia; vivid pink to glowing deep pink, outer petals reflexed, habit like Columbia.

Magazine  (May 1928)  Page(s) 42.  
 
Rapport de M. Bernaix, sur les meilleures Roses nouvelles de 1924...
New Columbia (E.-G. Hill). —- Accident fixé de la variété « Columbia » dont elle est une amélioration, les fleurs étant de plus belle forme. Variété splendide. Très florifère et parfumée.

Magazine  (1928)  Page(s) 211.  
 
Columbia (HT) E. G. Hill 1919) Ophelia X Mrs. George Shawyer....
c) New Columbia HT (E. G. Hill 1924) Sport of Columbia

Website/Catalog  (1925)  Page(s) 30.  
 
New Roses 1925. New Columbia (HT) (E. G. Hill. Co,) A distinct and excellent sport of ‘Columbia’ which it is claimed does not exhibit in the same degree, the tendency to deformed blooms sometimes found in the parent. The colour is somewhat lighter and the variety is declared to be practically identical to ‘Silver Columbia’ sent out by another grower. We think that this will prove a valuable addition as it is in all other respects equal to ‘Columbia’. 4/- each.