Newsletter  (May 2013)  Page(s) 3.  
 
The man who produced the most roses of this thirty-year period was Anthony Cook, also of Baltimore. Of fifteen roses...... three were bourbons or hybrid bourbons (‘Renno’, ‘Charles Getz’, ‘and ‘Oplitz’)

Magazine  (1 Apr 1880)  Page(s) 60.  
 
[From "NOTICE SUR LES ROSES AMÉRICAINES" by H.B. Ellwanger, read at the Horticultural Society of Rochester on 29 January 1880]
Rosa Bourbonica. — (Ile Bourbon).
Oplitz (Anthony Cook, 1871). — Hybride vigueur moyenne, fleurs rouge vif Semis de Gloire des Rosomanes.