Why would Sirius need to be killed to keep a secret?

[doug rogers]

No: HPFGUIDX 163322

One line that has always puzzled me - and can clearly be read in a  
very ambiguous fashion, that Lupin is surprised at Harry's hearing  
the voice of his own old friend - an innocent reading of the line for  
sure - is Lupins saying "You heard James?" when Lupin is teaching the  
Patronus, as Harry recounts one of his flashbacks.

  I like Lupin as much as anyone, I have great sympathy for his  
plight. But what it suggests to me is that he knows a bit more than  
what he's saying about what happened. There is no suggestion of  
subtext in the line, how it is delivered, what Lupin looks like when  
he is saying it, as Harry is so wrapped up in his own retelling of  
the thing. Such information would be more telling.

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