Book  (1936)  Page(s) 170.  
 
Cook, Mrs. John (HT) Cook 1920; Ophelia X 3 unknown seedlings; white, shaded soft pink, sometimes deep pink, large, double, cup form, lasting, fragrance 5/10, floriferous, long strong stems, growth 6/10. Sangerhausen

Book  (1934)  
 
Mrs. John Cook (H.T.): Flower white, suffused with delicate pink. The colour varies with the season, the flush of pink being more pronounced during cool weather, while the bloom is almost white during the long days of bright sunshine. Growth strong, free. A welcome addition to 'White Killarney.'

Book  (1926)  Page(s) 57.  
 
Chas E. F. Gersdcorff, Washington, D.C. Budded and Own-Root Roses.
The following, as budded plants, proved either short-lived or otherwise worthless, and have not been tried on their own roots. Growth was very poor. .... and Mrs. John Cook

Book  (1925)  
 
p105. John T. Roberts. Own-Root Roses in Colorado.
Some other roses do so poorly here as to be quite generally discarded. Mrs. John Cook poor bud and flower form.

p132. Mary Senni (Countess Giulio Senni).
'Poete Jean Duclos' is a good light rose of a shell-pink, and so are Mrs. John Cook and 'Mrs. E. J. Hicks', both very fragrant.

Website/Catalog  (1925)  Page(s) 46.  
 
(67) [In order of popularity last year]. Mrs. John Cook (HT) (Cook, 1919). F2. Ivory white, occasionally suffused with light pink. The bud is firm and of nice formation, opening into a cup-shaped double flower. This variety has shown some very beautiful blooms and the growth has improved considerably over that shown last year. Foliage is mildew proof, while the blooms are very sweetly scented and last well when cut. E.

Book  (1923)  Page(s) 90.  
 
G. A. Stevens. The 1923 Rose Year in Northern Ohio.
Two older roses which I like very much, and which are seldom heard of, are Mrs. John Cook and 'Mme. Marcel Delanney'. Their chief fault, common to both, is shy blooming, but we have so many heavy blooming roses that are somewhat commonplace, that I am glad to wait for beautiful and unusual roses.

Website/Catalog  (1923)  Page(s) 38.  
 
Hybrid Tea Roses .... Mrs. John Cook (Cook, 1919). White with pink. (Ophelia X Panama).

Magazine  (Mar 1922)  Page(s) 18.  
 
"New Roses for the Garden" by Charles E. F. Gersdorff
Good whites are scarce; there are, indeed but few of outstanding quality. [...] A real American is Mrs. John Cook (1920), from the original Hybrid-tea Rose "factory" of this country, the Baltimore, Md., establishment of John Cook. It is a real giant amongst garden Roses; flowers of great substance, glistening clear white, sometimes slightly tinted pink on the outer petals; has many outstanding qualities.

Book  (1922)  Page(s) 57.  
 
G. A. Stevens, Ohio. Experience with Own-Root Roses
Mrs. John Cook gave very lovely flowers which lasted a long time, but not many of them.

Website/Catalog  (1922)  Page(s) 11.  
 
Novelty Roses 1922.
Mrs. John Cook (HT) (Cook). Colour, ivory-white, occasionally suffused with light pink during cool weather, but usually opening clear white in every petal. The bud is firm and of nice formation, opening into a cup-shaped flower of enormous proportions, but without a trace of coarseness in any stage; the large flaky petals are of splendid texture, and are well rounded in form. When well established, it will produce flowers larger than 'Frau Karl Druschki', in fact, larger than any ever-blooming Rose we know of, and it is one of the most prolific Roses ever offered. It is a strong and healthy Rose in every respect, being free from mildew and other diseases. The growth is robust in character, branching continuously from the base, producing long-stemmed flowers of exquisite fragrance, and developing a rugged, hardy plant. 4/- each