Book  (Apr 1999)  Page(s) 236.  
 
Nemo, Trans. “No One”. Conard-Pyle, 1928. The author cites the Conard & Pyle description.

Magazine  (Jun 1929)  Page(s) 90-91, 194, 206, 208.  
 
[From "The Renaissance of the Hybrid Perpetual" by J. H. Nocolas]
The same pillar treatment may be applied to some hybrids of Rugosa, so hybridized that the Rugosa features are much obliterated and the Hybrid Perpetual characters have become predominant: Conrad F. Meyer, Nova Zembla, Turke's Samling, Nemo, Mme. Julien Potin, Ruskin, etc.

Book  (1928)  Page(s) 40.  
 
J. H. Nicolas. Climbing Roses in the Amateur's Garden.
Neige d'Avril (Mult.), Nemo (H. Rug.), Nova Zembla (H. Rug.), Nur Mahal (H. Musk).

Magazine  (1928)  Page(s) 102.  
 
Nemo—Rug. Hyb.—A pillar or climbing everblooming Rugosa continuous bloomer, large double red roses, with old rose perfume.

Website/Catalog  (1928)  Page(s) 40.  
 
[Advertisement]
Nemo. The Mystery Rose "that nobody knows." A Rugosa. Large full blooms of brilliant scarlet-crimson with true old-rose perfume. Grows 10 feet or more and produces a succession of bloom all summer. Hardy everwhere. Splendid for tall pillars. $1.50 each.