Book  (1966)  Page(s) 135.  
 
We think, from what helpful Thames residents have told us that the single Musk Roses must have been planted at a much earlier date than these charming double forms. We feel fairly certain that these were hybrids of the strong-growing Himalayan Musk produced by Paul & Sons of England; though unfortunately we saw neither of them overseas. they were Paul's Himalayica alba magna and Paul's Himalayica Double Pink...

Book  (1933)  Page(s) 204.  
 
Paul's Himalayica Alba Magna. Paul & Sons, 1916. this is another interesting variation of R. brunoni, with white, semi-double flowers in great clusters like hybrid rhododendrons.