1. In St. Mungo’s, when they are going to visit Mr. Weasley- 'They climbed a flight of stairs and entered the "Creature-Induced Injuries" corridor, where the second door on the right bore the words 'DANGEROUS' DAI LLEWELLYN WARD: SERIOUS BITES.' If you put these words on a sign, they would read:

Creature-Induced Injuries
Dangerous
Dai Llewellyn Ward
Serious Bites

Take the first word of each of these and what do you get get? Creature Dangerous Dai Serious? No - Kreacher dangerous, Die Sirius...

2. On page 60 of the American edition of OOTP, just as they enter number twelve Grimmauld Place, it says...

Hermione/Sirius

Changing Yesterday by Rainyn Dawn
Link: link
Summary: Verus Fatum: True Destiny. Hermione must face her true destiny when in the wake of war a mysterious object pulls her through time. There she must sacrifice all to save those she loves most.
Length: 52 chapters - COMPLETED
FIRST PART OF COMPLETED TRIOLOGY
part 2: link
Part 3: link

Necessary by the Order by LadySeradeReturns
Link: link
Summary: Marriage Law for SiriusHermione. In order to protect her, he had to marry her.
Length: 25 chapters - COMPLETED

Serendipity by Platinum Express
Link: link
Summary: Sirius and Hermione discuss baby...