How did Jason Bourne know the location of the only other living Treadstone assassin?

I didn't notice that the glossed over this the first time I watched it, but I see two possible explanations.

1. At the end of The Bourne Identity, Jason Bourne briefly had access to some information about Treadstone when he infiltrates a safehouse. He could have found the information there and kept it. (This is a possible explanation, but I'm not crazy about it. If this is what the writers had in mind I think they would have alluded to it.)




2. Bourne was regaining some of his memories already by the end of the first film, so it's possible that if he and Jarda had ever worked closely together in the past he just knew where Jarda lived and remembered it. I think this is the more plausible explanation, and it is hinted at in the dialogue.

Jarda: Word in the ether was you'd lost your memory.
Jason Bourne: You still should have moved.

This seems to indicate that Jarda was counting on Bourne's memory loss to keep him safe. This is probably a bigger plot hole than Bourne suddenly remembering where Jarda lived. I'd think that a trained assassin would make himself disappear once all of his colleagues started turning up dead.

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