Sub Rosa is the first line of equipped bolts you encounter und the main roof of the cave. Follow the thin crack in the roof to the first lip. Once round the lip, head further into the cave and up to a rest on a solid stein. Continue towards the corner and then up to the lower-off at the 2nd lip. The slot next to the 2nd bolt is no longer usable, so the first roof now includes a big reach between bolts 1 and 3.