Book  (Jan 2000)  Page(s) 236.  
 
Golden Isles Hybrid Tree Peony (Saunders 1948). A semi-double yellow hybrid

Magazine  (Sep 1977)  Page(s) 20.  
 
"Botanical Descriptions of 40 Saunders Lutea Hybrids" by Dr. David Reath and Silvia Saunders
...These descriptions aim to provide the nurseryman and the average gardener with a means of determining the differences between the hybrids, many of which are very similar indeed...
Golden Isles—"Double Canary". More brilliant yellow, but less double, than Golden Hind. Petals among the stamens. Flares very dark wine-color; filaments same as flares. Stigmas cream; sheath cream.

Article (magazine)  (Jan 1955)  Page(s) 25.  
 
Varieties Raised in America. All by Professor Saunders...
The "Golden Hind Group." Yellow, clear or almost clear , generally semi- or fully double...
'Golden Isles,' (1948)

Article (magazine)  (Jan 1955)  Page(s) 57.  
 
Alphabetical Check List of Tree Peony Names In  Public Collections And/or Available in Nurseries 1954-1955
Lutea hybrid, Yellow, 'Golden Isles' (Saund. 1948)