I'm guessing it's that Albus's own father was committed to and died in Azkaban.
Hmm. That makes sense, and I can understand why you might leave the sentence truncated like that... but honestly it doesn't come across to me as clever writing, it just looks like a mistake. If there's a way to write it so that it's clearly a truncated thought instead of a writing error, that'd be better.
Possibly wording it 'Albus' own fa- "It is the best..."
Cutting it off in mid-word makes it a little more clear what is happening, and "fa" has the benefit of looking a bit like "face" so that it still takes some effort to process what the actual thought is.
- This thread has run its course. You will find newer threads in the discussion section.
Another discussion thread - the fourth - has reached the (arbitrary?) 500 comments threshold, so it's time for a new thread for Eliezer Yudkowsky's widely-praised Harry Potter fanfic.
Most of the paratext and fan-made resources are listed on Mr. LessWrong's author page. There is also AdeleneDawner's collection of most of the previously-published Author's Notes.
Older threads: one, two, three, four. By tag.
Newer threads are in the Discussion section, starting from Part 6.
Spoiler policy as suggested by Unnamed and approved by Eliezer, me, and at least three other upmodders:
It would also be quite sensible and welcome to continue the practice of declaring at the top of your post which chapters you are about to discuss, especially for newly-published ones, so that people who haven't yet seen them can stop reading in time.