Magazine  (1903)  Page(s) 310.  
 
Lady Constance Kennedy, pure white, double.

Magazine  (17 Nov 1900)  Page(s) 537.  
 
La Maladie noire des Clématites à grandes fleurs....Les variétés qui été les plus atteintes au Jardin botanique de la Ville sont :
4° Dans le groupe des Clematis Florida: Lady Constance Kennedy, Mme Ch. Thibaut.

Magazine  (1887)  Page(s) 425-426.  
 
Neue, frühblühende Clematis. Als ich vor einigen Tagen die Gärtnerei des Herrn Charles Noble in Sunningdale besuchte, so schreibt ein Correspondent des Garden am 2. Juli a. c., fielen mir einige neue Clematis aus der patens-Gruppe auf, die dort gezüchtet und gerade in den Handel gebracht waren. Es sind:
Lady Constance Kennedy. Eine prächtige, weißblühende Varietät. Junge Pflanzen bringen einfache Blumen hervor, sobald sie sich aber mehr entwickeln, werden dieselben halbgefüllt und gefüllt. Ausgezeichnete Acquisition zu unseren reinweißen, frühblühenden Sorten.

Translation:
New, early-blooming clematis. When I visited Mr. Charles Noble's nursery in Sunningdale a few days ago, a correspondent for the Garden writes on July 2nd a. c., I noticed some new clematis from the patens group that had been bred there and had just been brought onto the market. They are: 
Lady Constance Kennedy. A magnificent, white-flowering variety. Young plants produce simple flowers, but as they develop more they become semi-double and double. Excellent acquisition of our pure white, early flowering varieties.
 

Magazine  (Nov 1881)  Page(s) 168.  
 
Some three or four years ago, Mr. Noble exhibited several other crosses, many of which appear to partake of the blood of C. florida, but nothing more has been seen of them till this year, when a group was exhibited at South Kensing ton, which showed that some of them, at least, are destined to secure a share of the public favour. In one of them, the property of fragrance appears to be more fully developed than had been previously noticed. We append a few notes on the several varieties :
LADY CONSTANCE KENNEDY. A very profuseflowering variety, the blossoms having three rows of sepals, snowy white, the anthers deep plum-colour, giving it a decidedly distinct appearance.
....Of the foregoing sorts, George Eliot for its ragrance, Lady Constance Kennedy for its purity, and W. E. Gladstone for its size, are, in our opinion, to be preferred.
 

Magazine  (Sep 1881)  Page(s) 398.  
 
...the white Clematis Lady Constance Kennedy received the Certificate award.