Book  (1985)  Page(s) 163.  
 
....in May 1962 we began our career as hybridists...It was in 1964 that we saw the results in the open air, and began to select our first introductions. .... The most popular, because more conventional, were helped by a fortunate thought in naming them in association with one another. 'King Arthur', 'Guinevere', 'Sir Lancelot' and 'Merlin'. We introduced them in 1967, five years from the time of pollination...

Book  (1975)  Page(s) 107.  Includes photo(s).
 
Dr. A. S. Thomas,  Victoria. Some of the New Ones. 
Guinevere  HT. (Harkness, 1968) ('Red Dandy' x 'Mme A. Meilland'). The shapely pink flowers are very pretty but a little too small for my liking. Very free flowering. Healthy bushy plant.

Book  (1973)  Page(s) 60.  
 
Roy and Heather Rumsey, NSW. New Roses. 
Guinevere HT. (Harkness). This is another hybrid tea that looks rather more like a floribunda. The flowers are rather small but they are well formed with over thirty petals. The colour is rose pink.