"Family safe, do not reply, we are being watched." -- Arthur Weasley
HRH flee the Death Eaters by Apparating to Tottenham Court Road. Hermione’s handbag turns out to have hidden depths (undetectable extension charm), and HRH go to a Muggle café to plan their next move. Dolohov and Rowle arrive, they duel, and after cleaning up Harry recommends hiding out in Grimmauld Place.
Calendar and Dates
The same day as the previous chapter, so it is 1 August.
Interesting facts and notes
I've never done a Memory Charm.
Technically true; his backfiring wand's effect on Lockhart at the end of his second year was accidental.
"Nor have I," said Hermione, "but I know the theory."
But just days before (DH6), she described in some detail how she had made her parents forget her existence and had given them memories of false identities instead.
The Trace breaks at seventeen, that's wizarding law, you can't put it on an adult.
It sounds to me as though Ron is confusing two different issues here - that using the Trace on an adult is illegal, as opposed to whether it is possible.
Number twelve was visible to them, for they had been told of its existence by Dumbledore, its Secret-Keeper
That sounds to me as though the Fidelius Charm is still in operation, even though the Secret-Keeper is dead. This was discussed a little in DH6.
"Oh, damn, that'll be the books," she said, peering into it, "and I had them all stacked by subject..."