Hermione could feel someone watching her from the shadows. While she couldn't be certain that whomever it was meant her any harm, rarely had she experienced a similar situation when they didn't. She had always been very careful when she made her trips to the crumbling Black family home on Grimmauld Place. Cloaking her magic so that her husband wasn't aware of where she went was just the first step. Never did she approach the house directly without concern for her surroundings. Not paying attention to the immediate area was how one got captured or killed. Rodolphus Lestrange was a valued trainer in being stealthy when she was a young, willing recruit.