Magazine  (Sep 1977)  Page(s) 22-3.  
 
"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...
Vesuvian—Double rose-form; the very dark glossy petals are furled back. Flares none. Filaments short, few, dark. Stigmas crimson, may be 10, small. Sheath short and dark. Carpels pale creamy. Foliage finely-cut, deep color.

Article (magazine)  (Jan 1955)  Page(s) 25.  
 
Varieties Raised in America. All by Professor Saunders...
The "Black Pirate Group." Crimson to very dark, almost black maroon, single to double...
'Vesuvian,' (1948)