Book  (Oct 2001)  Page(s) 289.  Includes photo(s).

Book  (1999)  Page(s) 237.  

Magazine  (Jun 1922)  Page(s) 91.  
 
C’est par une température tropicale que je me suis rendu, le 24 mai, à la magnifique exposition organisée à Chelsea par la Royal Horticultural Society....
Jackmann and Son, de Surrey, nous rappelle son nom par les clématites. Les variétés les plus admirées sont : Gloire de St-Julien, Blue Gem, Nellie Moser, Mrs George Jackmann, blanche, Empress of India, rose violacé, Mrs Spencer Castle, double mauve, Crimson King, rouge, Belle of Woking, double lilas.

Website/Catalog  (1912)  Page(s) 77.  
 
Spring & Summer Flowering Clematis.
Flowering during May, June and July.
As these flower upon the ripened wood of preceding year's growth, they must be but slightly pruned in winter.
Mrs. George Jackman, satiny white, with a creamy bar...  1s. 6d

Website/Catalog  (1907)  Page(s) 66.  
 
Clematis in pots to plant out in spring and summer.
General Collection.
64 Mrs. George Jackman (patens), satin white.

Book  (1906)  Page(s) 51.  
 
Principal garden varieties of Clematis:
Patens type. (Flower in May and June.)
Mrs. G. Jackman... Satiny-white, creamy bar.

Magazine  (1877)  Page(s) 270.  
 
Clematis M^rs George Jackman (Jackman); blanc.

Magazine  (29 May 1875)  Page(s) 684.  
 
MESSRS. JACKMAN'S CLEMATISES.
Messrs. Jackman & Son's popular exhibition at Regent's Park has now been brought to a close, and we may fittingly call attention at its termination to some of the charming novelties which it has been the means of introducing to our notice.  Amongst the later novelties of the patens group were... Mrs. George Jackman, a large, broad-sepaled white, of great beauty and excellence.

Magazine  (Jul 1874)  Page(s) 169.  
 
...several other varieties of the same patens section, and of very great merit, have also been exhibited and certificated, especially those named The Queen, a delicate mauve, Vesta, a satiny-white, Miss Crawshay, a soft Solferino-rose, Samuel
Moulson, a mauve, with reddish bars, and Mrs. George Jackman, a superb white, with extraordinarily large flowers.