Lol, I forgot to include the German, now edited. The only difficulty in translating from the German is to arrive at a results that sounds as if it is English without losing the literal German meaning. I'm happy to be corrected at any time.
It looks like this rose isn't Dr. Grill if Bennett introduced it in 1890. Maybe Dr. Grill was given the name Dulce Bella at some point, or maybe they were so similar they were mixed up, However in any case, they look to be originally two separate varieties.