Book  (1953)  Page(s) 75.  
 
Dr. A. S. Thomas.  Yellow Roses. 
Duchess of Portland ...deeper in colour [than 'Mrs. Harold Brocklebank]

Book  (1936)  Page(s) 576.  
 
Portland, Duchess of (HT) A. Dickson 1901; pale sulphur-yellow, very large, very double, fine form, high-centered, fragrance %710, floriferous, long firm stems, growth 6/10, upright.

Article (newspaper)  (28 Jan 1928)  Page(s) 14.  
 
THE ROSARY By Dog Rose.
There are very few roses that are as shy in flowering as Duchess of Portland. Although this rose produces almost perfect exhibition blooms it is such a poor flowerer that it does not deserve a place, except for exhibition purposes. It is a rich cream flower, having abundance of petals remarkably well formed, and a high pointed centre.

Website/Catalog  (1921)  Page(s) 13.  
 
Roses.
Duchess of Portland, sulphur-yellow; class: Hybrid Tea; habit of growth: robust.

Website/Catalog  (1914)  Page(s) 16.  
 
Hybrid Tea Roses.
Duchess of Portland, Alex. Dickson & Sons, Ltd., 1901, robust. Pale sulphur-yellow, large, full, fine, perfect form; Gold Medal, N.R.S.

Website/Catalog  (1912)  Page(s) 76.  
 
Ever-Blooming Roses.
Duchess of Portland  pale sulphur-yellow, one of the best of its colour. 

Website/Catalog  (1912)  Page(s) 11.  
 
Hybrid Tea. Duchess of Portland. Mod.

Website/Catalog  (1911)  Page(s) 19.  
 
Hybrid Tea. Duchess of Portland. Resembling 'K. A. Victoria', but somewhat higher in the centre; good show rose. Poor grower.

Book  (1910)  Page(s) 327.  
 
Duchess of Portland [Hybrid Tea]; flowers pale yellow; very large and good habit. In the way of 'Kaiserin Augusta Victoria'.

Book  (1907)  Page(s) 70.  
 
A fine exhibition rose but a difficult variety to grow.