Dark times will change for a better future
Chapter 7:
Harry apparated to grimmauld place wearing his invisibility cloak, he was trying not to get noticed as he looked the exact image of his father, and his father was on every wanted list so he really didn't need to get caught.
Once harry entered grimmauld place he used the spell to reveal other people in the house, it revealed one house elf, harry knew that it was kreacher and house elves could see threw invisiblilty cloaks so he had to move fast.
Harry went into the drawing room and saw the locket in an open drawer, he must have known that regulus put it their a couple of days ago, as it was getting close to the date he is meant to die on, just as harry reached out to grab the locket, he felt his cloak being pulled down.