I actually think it was his attempt to speak, as he had tried earlier. But since he was without tongue, he was unable.Tell Me Why said:I also felt sad for him when Charlotte tried to kiss him and he opened his mouth like he wanted to but she couldn't, I guess.
And, uhhh, I guess this has SPOILERS (Light blue color, highlight to read)
While that certainly plays a part in it, I don't think that was the only basis for Griffith's ultimate decision. That's really quite shallow, if you consider it.All of the things Griffith sees while being carried around, I think, just made do what he does in volume 12-13. He sees everyone doing things he wish he could do. He begins to hate them, especially Guts, because he blames him for all of it.
Being in Griffith's current state of emaciation, not only could he not defend himself (from Wyald), but he could no longer lead the Hawks. He could no longer accomplish his dream.
As he is shown later, if he had continued as he was, his life would be very quiet and practically void of all meaning.
How could he possibly continue?
And he certainly blamed Guts for something, but I love this excerpt from a very old (and reliable ;)) translation:
Volume 12:
Griffith: "...Yes.
Out of thousands of comrades and ten thousand enemies
only you, only you
only you
Made me forget my dream."
If Casca really did.... what?I also think Casca never really stopped loving Griffith and it's shown a lot in the volume. It kind of makes you wonder if Casca really did .. hmm, well. I can't seem to find the spoiler tag so I'll stop there.