Book  (2010)  Page(s) 92.  
 
Peter Harkness. An Update on Persica Hybrids.
....it was decided to introduce four of them, rather than see them perhaps lost for ever.
Nigel Hawthorne [HARquibbler] (R. persica x 'Harvest Home') was pollinated in 1976, introduced in 1989, and has larger flowers than the others, up to 8cm (2.2in) across, in light salmon, opening wide to show brownish red petal bases. Its wrinkled leaves show the Rugosa influence of 'Harvest Home', a 'Scabrosa' seedling.
....the last named was at the request of the Royal National Rose Society, when Nigel, famous for his role as 'Sir Humphrey' in television's Yes, Minister', was invited to open the Society's Rose Festival, Peter asked what sort of roses he liked. "It's going to be a bit of a problem" Nigel replied, "because the kind of roses I like are unperfect roses". The unique Persica/Rugosa cross, imperfect in respect of its brief period of flower, delighted him.

Magazine  (Nov 1997)  Page(s) 74.  
 
Heritage Roses in Australia Inc. Third National Conference Proceedings.
Sean McCann. Heritage Roses - A Century From Now.
....and the next is a totally fascinating little rose called Nigel Hawthorne, but the flowers are so tiny you wouldn't believe it. When you get a camera out and you can bring them up and enlarge them like that, then you can see them.

Book  (11 Jun 1993)  Page(s) 39.  
 
Hulthemia persica x Rosa 'Harvest Home'. Harkness (England) 1989. Description... Pointed buds open to single blossoms of light salmon-pink with deep scarlet at the base of the petals... An intergeneric hybrid, x 'Nigel Hawthorne' is a milestone in rose breeding. Hulthemia persica very closely resembles a rose and was formerly classified as a subgenus of Rosa.

Book  (Apr 1993)  Page(s) 411.  
 
Nigel Hawthorne Shrub, pale salmon-rose, deep scarlet eye at base, reverse same, 1989, (HARquibble); H. persica x 'Harvest Home'; Harkness, R. Description.

Book  (Feb 1993)  Page(s) 272.  
 
Nigel Hawthorne (HARquibbler) Modern shrub. Parentage: R. persica x 'Harvest Home'. England 1989. Description and cultivation... The five-petalled flowers are pale salmon pink with red markings at the base of each petal...

Book  (1985)  Page(s) 166.  
 
The most interesting project was Rosa persica, a difficult species, of which I probably held the largest stock ever grown outside its native regions. The object here was to raise a fertile hybrid, but although we got in the end over a hundred, some very beautiful, and notable as the first recorded since 1836, they were all sterile and bloomed only in the summer. Their beauty lay in a dark red eye at the centre of the bloom. I obtained them single and double, yellow, pink, salmon and orange. Having put a lot of work into this bit of pioneering, I thought we might introduce two of the hybrids, and sent them to the Royal National Rose Society's trials. No interest was expressed, and I accepted the fact that they were not yet suitable for gardens, although of great botanical interest.