Exactly, you can follow the lines through the 1920s and 30s as the Pernetianas were merged with the Ophelia descendants. The shiny leaves, thin, red stems and big prickles carry through, occasionally skipping a generation, but then appearing again in later plants like Sutter's Gold. I have enough of these HTs now that I can see what Pernet and the other breeders were working to achieve -- the refined elegance of Ophelia with the colour from Rosa foetida -- culminating in Peace.