Arthur referred to it the next day in his own post here (http://alt-arthur.livejournal.com/2924.html). ("Sirius, this means you can call off your hunt for Shacklebolt. I trust this will free up some of your time, enough to give you the chance to concentrate on diverting Malfoy's suspicions and salvaging at least part of the Lazlo operation. Were you able to track down Molly's cousin that I told you about? Was he able to help?") It was a continuation of his earlier discussions with Sirius here (http://alt-sirius.livejournal.com/8073.html) about trying to come up with the proofs Malfoy was demanding.