Newsletter  (1994)  Page(s) 15. Vol 3, No. 4.  
 
Harbinger. H. Gig. Clg. 1923 Alister Clark. R. gigantea seedling.

Book  (1990)  Includes photo(s).
 
p97. [same picture as in Trevor Nottle 1983 ]

p120. Harbinger. Pink. x gigantea. Climber, 1923. Early.

Book  (1983)  Includes photo(s).
 
plate. 71

p69. One of Mr. Clark’s most striking breeding lines was the one where he used the huge climbing rose from Burma, Rosa gigantea, as the pollen parent and judiciously selected Hybrid Teas of the day. Among them are the following….. and ‘Harbinger’. They are most attractive strong climbers and are worth the trouble of tracking down. They are all still grown in private collections, through owing to their large size I doubt many people would have more than two in a small garden…..

p70. ‘Harbinger’ (1923) a vigorous climber with abundant bloom. The foliage is large and light green. In late spring the large single pale pink flowers are a great opening to the rose season. A much more refined shade of pink than the Hybrid Musk ‘Vanity’.

Magazine  (1979)  Page(s) 5 Vol 1, No. 3.  
 
Harbinger – 1923. Intro. Hackett. Bud pointed. Flower large, single, slightly fragrant, soft pink. Foliage light. Vigorous climber, abundant bloom. R. gigantea hybrid.

Book  (1970)  Page(s) 162.  
 
Mr. Beaumont Smith of Urrbrae, South Australia writes about three old favourite roses which his late father grew for over forty years. He hopes that other rose lovers may wish to grow and enjoy these favourites of the past..... Harbinger is one of the late Alister Clark’s most glorious creations which my father felt should never become extinct. One of the chief qualties of this lovely clear pink single is its very early flowering habit. The buds appear during late August and early September. This splendid climber is a strong grower.”

Book  (1963)  Page(s) 80.  
 
David Ruston. Overture and Finale of Spring.
And last of the early roses but by no means least, we must include the late Alister Clark's Gigantea Hybrids. 'Harbinger' and 'Courier', both soft pink singles, reach their peak in September after flowering quite well in July and August....

Book  (1946)  Page(s) 93.  
 
Dr. A. S. Thomas: Then, of course, there are the very early spring blooming climbers of Rosa gigantea parentage – Flying Colours, Harbinger and Jessie Clark.

Book  (1940)  Page(s) 86.  
 
Dr. W. R. Groves: [in Adelaide during Flower Week] Lorraine Lee and .... The only other roses in flower that I noted were Blackboy, Harbinger and Jessie Clark….

Book  (1939)  Page(s) 91.  
 
E. A. Smith: Then there are the singles, Harbinger, Jessie Clark, Flying Colours and others, to carry on until the full flush of blooms in the spring.

Book  (1938)  Page(s) 30.  
 
Alister Clark: I am getting good seedlings from it (Flying Colours) and, together with Harbinger and Jessie Clark, I have a trio of parents of great promise.

p87 T. A. Stewart: Harbinger, as the name implies is another garden brightener in the early spring, with a strong climbing habit and flowers of a pure refined pink.