I've just finished reading the entire KnightSaga: that's Knightfall, KnightQuest and KnightsEnd. I've also read Bane's origin story (Vengence of Bane) and the various issues leading up to Knightfall; and I'm still puzzled.
Towards the end of the Knightfall storyline, Bane is reavealed to have uncovered Batman's real identity and shows up at Wayne Manor. How did he know that?
In the issues, Bane does have an obsession with Batman, but he's rarely in direct contact with him. And he doesn't even tail him. He's delegated that task to the falcon guy (named 'Bird'); and clearly Bird isn't the one to figure it out. Bird even asks Bane how he knew, to which Bane doesn't give a real explanation.
After 'Knightfall: Who Rules the Night', Bane barely appears at all in in KnightQuest and KnightsEnd. (It's possible I missed an issue or two. And some issues I got my hands on had a few pages missing.)
So, my question is, do we ever learn how Bane deduced that Bruce is Batman? If so, in what issue(s)?