Was playing through the first real mission (High Overseer Campbell) and found this note in a third-story building near the Distillery (it was written on the wall).

'Nate, drop point has changed. Leave it in the shutter under the bridge. If the elixir ain't there you don't get paid.'

I had to stop playing... so could someone follow up on this for me?

On a funnier note, in the same building, it also says;

'I saw Slackjaw with your mother'
'Yeah? I saw him with your father'